Contents
Contents
MOTORCYCLE SAFETY...............................1
Important Safety Information..............................2
Important Safety Precautions..........................2
Accessories & Modifications ..............................3
Safety Labels.......................................................4
INSTRUMENTS & CONTROLS....................5
Operation Component Locations ........................6
Indicator ..............................................................7
MIL Blink Pattern...........................................7
Current DTC/Freeze DTC ..............................7
Circuit Inspection............................................8
DTC Index ......................................................9
BEFORE RIDING...........................................11
Are You Ready to Ride? ...................................12
Is Your Motorcycle Ready to Ride?..... .............13
Pre-ride Inspection........................................13
BASIC OPERATING INSTRUCTIONS ......15
Safe Riding Precautions................................16
Starting & Stopping the Engine ........................17
Fast Idle Knob ..............................................17
Preparation ....................................................17
Starting Procedure ........................................17
How to Stop the Engine................................18
Break-in Guidelines ..........................................19
SERVICING YOUR HONDA........................21
Before You Service Your Honda
The Importance of Maintenance .......................22
Maintenance Safety...........................................23
Important Safety Precautions........................23
Maintenance Schedule ......................................24
General Competition Maintenance ...................26
Before & After Competition Maintenance........30
Between Motos & Practice Maintenance .....30
After Competition Maintenance ...................30
Service Preparations
Maintenance Component Locations..................32
Seat ....................................................................33
Fuel Tank...........................................................34
Subframe ...........................................................36
Service Procedures
Fluids & Filters
Fuel System.......................................................40
Engine Oil .........................................................49
Transmission Oil ...............................................52
Coolant ..............................................................54
Air Cleaner ........................................................56
Crankcase Breather ...........................................58
Engine
Throttle ..............................................................59
Engine Idle Speed .............................................61
Clutch System ...................................................62
Spark Plug .........................................................67
Valve Clearance.................................................68
Piston/Piston Rings/Piston Pin..........................76
Chassis
Suspension.........................................................85
Brakes................................................................90
Wheels...............................................................94
Tires & Tubes ....................................................95
Drive Chain .......................................................97
Exhaust Pipe/Muffler ......................................100
Steering Damper..............................................103
Additional Maintenance Procedures ...............105
Appearance Care .............................................107
Contents
Contents
ADJUSTMENTS FOR COMPETITION ...109
Front Suspension Adjustments ........................110
Front Suspension Air Pressure....................110
Front Suspension Damping.........................110
Fork springs.................................................111
Front Suspension Disassembly ...................112
Damper Oil Change ....................................115
Fork Assembly ............................................118
Rear Suspension Adjustments.........................125
Rear Suspension Spring Pre-Load ..............125
Rear Suspension Damping..........................126
Rear Suspension Race Sag .........................127
Suspension Adjustments for Track
Conditions .......................................................129
Suspension Adjustment Guidelines.................130
Tuning Tips .....................................................133
Spark Plug Reading ....................................133
Steering Damper Adjustment ..........................134
Steering Damper Damping .........................134
Steering Damper Adjustment Guidelines........135
Chassis Adjustments........................................136
Rear End .....................................................136
Fork Height/Angle ......................................136
Wheelbase ...................................................136
Gearing ............................................................137
Tire Selection for Track Conditions................138
Personal Fit Adjustments ................................139
Control Positioning.....................................139
Handlebar Position, Width & Shape...........139
TIPS ................................................................141
Transporting Your Motorcycle ........................142
Storing Your Honda.........................................143
Preparation for Storage ...............................143
Removal from Storage................................143
You & the Environment ..................................144
Troubleshooting...............................................145
TECHNICAL INFORMATION ..................147
Vehicle Identification ......................................148
Serial Numbers ...........................................148
Specifications ..................................................149
Torque Specifications......................................150
Nuts, Bolts, Fasteners .................................150
Oxygenated Fuels............................................153
Competition Logbook .....................................154
Optional Parts List ..........................................156
Spare Parts & Equipment ................................157
Spare Parts ..................................................157
General Tools ..............................................157
Honda Special Tools ...................................157
Chemical Products ......................................157
Other Products ............................................157
Wiring Diagram...............................................158
CONSUMER INFORMATION ...................159
Authorized Manuals ........................................160
Contacting Honda............................................161
Your Dealer .....................................................162
The Honda Rider’s Club (USA only) .............163
INDEX ............................................................164
QUICK REFERENCE
2013
Honda CRF250R
OWNER’S MANUAL & COMPETITION HANDBOOK
Introduction
Introduction
Congratulations on choosing your Honda CRF
motocross motorcycle.
When you own a Honda, you’re part of a
worldwide family of satisfied customers – people
who appreciate Honda’s reputation for building
quality into every product.
Your CRF is a high performance racing
motorcycle that utilizes the latest motocross
technology and is intended for competition use in
sanctioned, closed-course events by experienced
riders only.
Be aware that motocross is a physically
demanding sport that requires more than just a
fine motorcycle. To do well, you must be in
excellent physical condition and be a skillful
rider. For the best results, work diligently on
your physical conditioning and practice
frequently.
Before riding, take time to get acquainted with
your CRF and how it works. To protect your
investment, we urge you to take responsibility for
keeping your CRF well maintained. Scheduled
service is a must, of course. But it’ s just as
important to observe the break-in guidelines, and
perform all the pre-ride and other periodic checks
detailed in this manual.
You should also read the owner ’s manual before
you ride. It’s full of facts, instructions, safety
information, and helpful tips. To make it easy to
use, the manual contains a table of contents, a
detailed list of topics at the beginning of each
section, and an index at the back of the book.
As you read this manual, you will find
information that is preceded by a
symbol. This information is intended to help you
avoid damage to your CRF, other property, or the
environment.
Unless you are mechanically qualified and have
the proper tools, you should see your dealer for
the service and adjustment procedures discussed
in this manual.
An official Honda Service Manual for your CRF
is available (page 160). It is the same manual
your dealer uses. If you plan to do any service
on your CRF beyond the standard maintenance
procedures in this manual, you will find an
official Honda Service Manual a valuable
reference.
If you have any questions, or if you ever need a
special service or repairs, remember that your
dealer knows your CRF best and is dedicated to
your complete satisfaction.
Please report any change of address or ownership
to your dealer so we will be able to contact you
concerning important product information.
You may also want to visit our website at
USA: www.powersports.honda.com.
Canada: www.honda.ca.
Happy riding!
California Proposition 65
Warning
WARNING: This product contains or emits
chemicals known to the State of California to
cause cancer and birth defects or other
reproductive harm.
NOTICE
ABBREVIATION
Throughout this manual, the following
abbreviations are used to identify the respective
parts or system.
Abbrev. term
CKP sensor
DTC
ECM
ECT sensor
HPSD
IAT sensor
MAP sensor
MIL
PGM-FI
TDC
TP sensor
Crankshaft Position sensor
Diagnostic Trouble Code
Engine Control Module
Engine Coolant Temperature sensor
Honda Progressive Steering Damper
Intake Air Temperature sensor
Manifold Absolute Pressure sensor
Malfunction Indicator Lamp
Programmed Fuel Injection
Top Dead Center
Throttle Position sensor
Full term
A Few Words About Safety
Your safety, and the safety of others, is very important. And operating this motorcycle safely is an important responsibility.
To help you make informed decisions about safety, this manual contains a section devoted to
Motorcycle Safety, as well as a number of Safety Messages
throughout the manual.
Safety Messages are preceded by a safety alert symbol and one of three signal words:
DANGER, WARNING, or CAUTION.
These signal words mean:
You WILL be KILLED or SERIOUSLY HURT if you don’t follow instructions.
You CAN be KILLED or SERIOUSLY HURT if you don’t follow instructions.
You CAN be HURT if you don’t follow instructions.
Of course, it is not practical or possible to warn you about all hazards associated with operating or maintaining a motorcycle. You must use your own good
judgement.
Safety Messages
DANGER
WARNING
CAUTION
Motorcycle Safety
Motorcycle Safety 1
This section presents some of the most important
information and recommendations to help you
ride your CRF safely. Please take a few
moments to read these pages. This section also
includes information about the location of safety
labels on your CRF.
Important Safety Information...............................2
Important Safety Precautions..........................2
Accessories & Modifications ...............................3
Safety Labels........................................................4
Important Safety Information
2 Motorcycle Safety
Important Safety Precautions
Your CRF can provide many years of pleasure, if
you take responsibility for your own safety and
understand the challenges you can meet in
competitive racing.
As an experienced rider, you know there is much
you can do to protect yourself when you ride.
The following are a few precautions we consider
to be most important.
Never Carry a Passenger.
Your CRF is designed for one operator only.
Carrying a passenger can cause a crash in which
you and others can be hurt.
Wear Protective Gear.
Whether you’re practicing to improve your skills,
or riding in competition, always wear an
approved helmet, eye protection, and proper
protective gear.
Take Time to Get to Know Your CRF.
Because every motorcycle is unique, take time to
become thoroughly familiar with how this one
operates and responds to your commands before
placing your machine, and yourself, in
competition.
Learn and Respect Your Limits.
Never ride beyond your personal abilites or faster
than conditions warrant. Remember that alcohol,
drugs, illness and fatigue can reduce your ability
to perform well and ride safely.
Don’t Drink and Ride.
Alcohol and riding don’t mix. Even one drink
can reduce your ability to respond to changing
conditions, and your reaction time gets worse
with every additional drink. So don’t drink and
ride, and don’t let your friends drink and ride
either.
Keep your Honda in Safe Condition.
Maintaining your CRF properly is critical to your
safety. A loose bolt, for example, can cause a
breakdown in which you can be seriously
injured.
Accessories & Modifications
Motorcycle Safety 3
Accessories & Modifications
Installing non-Honda accessories, removing
original equipment, or modifying your CRF in
any way that would change its design or
operation, could seriously impair your CRF’s
handling, stability, and braking, making it unsafe
to ride.
WARNING
Improper accessories or modifications
can cause a crash in which you can be
seriously hurt or killed.
Follow all instructions in this owner’s
manual regarding modifications and
accessories.
4 Motorcycle Safety
Safety Labels
Read these labels carefully and don’t remove them.
If the label comes off or becomes hard to read, contact your dealer for replacement.
(For Canada)
Instruments & Controls 5
Instruments & Controls
Read this section carefully before you ride. It
presents the location of the basic controls on your
CRF.
Operation Component Locations .........................6
Indicator ...............................................................7
MIL Blink Pattern............................................7
Current DTC/Freeze DTC ...............................7
Circuit Inspection.............................................8
DTC Index .......................................................9
6 Instruments & Controls
Operation Component Locations
clutch lever
MIL
front brake lever
engine stop button
throttle grip
fast idle knob
(engine idle speed)
shift lever
kickstarter
rear brake pedal
Instruments & Controls 7
Indicator
The MIL on your CRF keeps you informed,
alerts you to possible problems, and makes your
riding safer and more enjoyable. Refer to the
MIL frequently.
(1)
(1) MIL
The MIL flashes when there is any abnormality
in the PGM-FI system. It should also light for a
few seconds and then go off when the engine is
started.
If the MIL comes on at any other time, reduce
speed and refer to an official Honda Service
Manual available for purchase from your dealer
(page 160).
If the MIL does not come on when it should,
have your dealer check it for problems.
MIL Blink Pattern
The MIL will blink the appropriate DTC number
if the ECM detects an active problem while the
engine is running at less than 5,500 rpm.
The MIL will stay ON when the engine speed is
over 5,500 rpm.
The MIL has two types of blinks: a long blink
and short blink. The long blinking lasts for 1.2
seconds, the short blinking lasts for 0.4 seconds.
One long blink is the equivalent of ten short
blinks. For example, when one long blink is
followed by two short blinks, the MIL is 12 (one
long blink = 10 blinks, plus two short blinks).
When the ECM stores more than one DTC, the
MIL will indicate them by blinking in the order
from the lowest number to highest number.
Current DTC/Freeze DTC
The DTC is indicated in two ways according to
the failure status.
– In the case that the ECM detects an active
problem, the MIL will come on and will start to
blink the DTC when the engine is started.
– In the case that the ECM does not detect an
active problem but has recorded a previous
problem in its memory, the MIL will not come
on. If it is necessary to retrieve any past
problems stored in the memory, refer to an
official Honda Service Manual.
8 Instruments & Controls
Indicator
Circuit Inspection
Always clean around the ECM and keep debris
away from the connectors before disconnecting
them.
A faulty PGM-FI system is often related to
poorly connected or corroded connections. Check
the following connections.
(1) MAP sensor connector
(2) ECT sensor connector
(3) TP sensor connector
(4) IAT sensor connector
(5) Injector connector
(6) No.1/No.2 CKP sensor connector
(7) ECM connector
Remember, circuit inspection is not a “cure-all”
for other problems in your engine’s PGM-FI
system.
(1)
(2)
(5)
(7)
(3) (6) (4)
Instruments & Controls 9
Indicator
DTC Index
MIL blinks
1
2
7
8
9
MAP sensor circuit malfunction
MAP sensor performance problem
ECT sensor circuit malfunction
TP sensor circuit malfunction
IAT sensor circuit malfunction
12 Injector circuit malfunction
19 No.1 CKP sensor circuit malfunction
69 No.2 CKP sensor circuit malfunction
Poor performance (driveability)
Poor performance (driveability)
Hard start at a low temperature
Poor engine acceleration
Engine operates normally
• Engine does not start
• Injector, fuel pump and ignition shut down
• Engine does not start
• Injector, fuel pump and ignition shut down
• Engine does not start
• Injector, fuel pump and ignition shut down
Function Failure Symptom/Fail-safe Function
Should be serviced by your dealer, unless the owner has proper tools and is technically qualified.
The series of 12, 19, and 69 MIL blinks cannot be checked because the engine cannot be started.
If the engine does not start, check all connector connections and/or refer to an official Honda Service
Manual (page 160) for troubleshooting of the PGM-FI symptom.
Refer to MIL Blink Pattern on page 7.
Before Riding 11
Before each ride, you need to make sure you and
your Honda are both ready to ride. To help get
you prepared, this section discusses how to
evaluate your riding readiness, and what items
you should check on your CRF.
For information about suspension, steering
damper, and other adjustments, see page 109.
Before Riding
Are You Ready to Ride?.....................................12
Is Your Motorcycle Ready to Ride? ...................13
Pre-ride Inspection........................................13
12 Before Riding
Are You Ready to Ride?
Before riding your CRF for the first time, we
strongly recommend that you read this owner ’s
manual, make sure you understand the safety
messages, and know how to operate the controls.
Before each ride, it’s also important to make sure
you and your CRF are both ready to ride.
For information about suspension, steering
damper, and other adjustments, see page 109.
Whether you’re preparing for competition or for
practice, always make sure you are:
• In good physical and mental condition
• Free of alcohol and drugs
• Wearing an approved helmet, eye protection,
and other appropriate riding gear
Although complete protection is not possible,
wearing the proper gear can reduce the chance or
severity of injury when you ride.
WARNING
Not wearing a helmet increases the
chance of serious injury or death in a
crash.
Be sure you always wear a helmet, eye
protection and other protective apparel
when you ride.
Before Riding 13
Is Your Motorcycle Ready to Ride?
Competitive riding can be tough on a motorcycle,
so it’s important to inspect your CRF and correct
any problems you find before each ride. Check
the following items (page numbers are at the
right):
Pre-ride Inspection
Check the following before each ride:
• Engine oil level .............................................50
• Transmission oil level...................................53
• Fuel line for condition ..................................40
• Coolant for proper level............................... 54
• Cooling system and hoses for condition.......55
• Spark plug for proper heat range, carbon
fouling and spark plug wire terminal for
looseness .......................................................67
• Air cleaner for condition and
contamination................................................56
• Clutch lever adjustment and freeplay ...........62
• Breather drain for cleaning ...........................58
• Steering head bearing and related parts
for condition................................................105
• Steering damper operation..........................103
• Throttle operation .........................................59
• Tires for damage or improper inflation
pressure ........................................................95
• Spokes for looseness.....................................94
• Rim locks for looseness ................................94
• Front and rear suspension for proper
operation .................................................85, 86
• Front and rear brakes, check operation ........90
• Drive chain for correct slack and adequate
lubrication................................................97-98
• Drive chain sliders and drive chain rollers
for damage or wear .................................97, 98
• Exhaust pipe/Muffler for looseness ............100
• Every possible part for looseness (such as
cylinder head bolts, engine mounting
bolts/nuts, axle nuts, handlebar holder bolts,
fork bridge pinch bolts, drive chain adjuster,
drive chain guide, wire harness connectors,
kickstarter mounting bolt) ...................150-152
• Indicator ..........................................................7
WARNING
Improperly maintaining this motorcycle or
failing to correct a problem before riding
can cause a crash in which you can be
seriously hurt or killed.
Always perform a pre-ride inspection
before every ride and correct any
problems.
This section gives basic information on how to
start and stop your engine as well as break-in
guidelines.
Safe Riding Precautions................................16
Starting & Stopping the Engine .........................17
Fast Idle Knob ..............................................17
Preparation ....................................................17
Starting Procedure ........................................17
How to Stop the Engine................................18
Break-in Guidelines ...........................................19
Basic Operating Instructions 15Basic Operating Instructions 15
Basic Operating Instructions
16 Basic Operating Instructions16 Basic Operating Instructions
Basic Operating Instructions
Safe Riding Precautions
Before riding your CRF for the first time, please
review the
Important Safety Precaution
beginning on page 2 and the previous section,
titled
Before Riding.
For your safety, avoid starting or operating the
engine in an enclosed area such as a garage.
Your CRF’s exhaust contains poisonous carbon
monoxide gas which can collect rapidly in an
enclosed area and cause illness or death.
Basic Operating Instructions 17Basic Operating Instructions 17
Starting & Stopping the Engine
Always follow the proper starting procedure
described below.
Your CRF can be kickstarted with the
transmission in gear by pulling in the clutch lever
before operating the kickstarter.
Fast Idle Knob
The fast idle knob has two functions:
• When pulled out, the fast idle knob assists in
first-time start-up for cold weather starting.
• When pushed in, it acts as an idle adjustment
screw. Refer to
Idle Speed Adjustment on
page 61.
Preparation
Make sure that the transmission is in neutral.
Starting Procedure
Always follow the proper starting procedure
described as follows.
Check the engine oil, transmission oil and coolant
levels before starting the engine (pages 50, 53, 54).
Cold Engine Starting
1. Shift the transmission into neutral.
2. If the temperature is 95°F (35°C) or below,
pull the fast idle knob (1) fully out.
(1) fast idle knob
3. With the throttle closed, operate the
kickstarter starting from the top of the
kickstarter stroke, and kick through to the
bottom with a rapid, continuous motion.
4. About a minute after the engine starts, push
the fast idle knob back all the way to fully
OFF.
If idling is unstable, open the throttle slightly.
(1)
Warm Engine Starting
1. Shift the transmission into neutral.
2. Kick-start the engine (Do not open the
throttle).
If Dif
ficult to Start After Stalling
1. Shift the transmission into neutral.
2. With the throttle fully opened, repeat
kickstarter operation approximately 10 times
to discharge excessive fuel from the engine.
3. Kick-start the engine. (Do not open the
throttle.)
Snapping the throttle or fast idling for more than
5 minutes may cause exhaust pipe discoloration.
18 Basic Operating Instructions
Starting & Stopping the Engine
18 Basic Operating Instructions
How to Stop the Engine
(1)
(2)
(1) throttle (2) engine stop button
Normal Engine Stop
1. Shift the transmission into neutral.
2. Lightly open the throttle (1) two or three
times, and then close it.
3. Push and hold the engine stop button (2) until
the engine stops completely.
Emer
gency Engine Stop
To stop the engine in an emergency, push and
hold the engine stop button.
Basic Operating Instructions 19
Break-in Guidelines
Help assure your CRF’s future reliability and
performance by paying extra attention to how
you ride during the first operating day or 15
miles (25 km).
During this period, avoid full-throttle starts and
rapid acceleration.
This same procedure should be followed each
time when:
• piston is replaced
• piston rings are replaced
• cylinder is replaced
• crankshaft or crank bearings are replaced
Servicing Your Honda 21
Servicing Your Honda
Keeping your CRF well maintained is absolutely
essential to your safety. It’s also a good way to
protect your investment, get maximum
performance, avoid breakdowns, and have more
fun.
To help keep your CRF in good shape, this
section includes a Maintenance Schedule for
required servicing and step-by-step instructions
for specific maintenance tasks. You’ll also find
important safety precautions, information on oils,
and tips for keeping your Honda looking good.
An ECM system is used on this motorcycle;
consequently, routine ignition timing adjustment
is unnecessary. If you want to check the ignition
timing, refer to the Honda Service Manual (page
160).
An optional tool kit may be available. Check
with your dealer’s parts department.
Before You Service Your Honda
The Importance of Maintenance ........................22
Maintenance Safety............................................23
Important Safety Precautions........................23
Maintenance Schedule .......................................24
General Competition Maintenance ....................26
Before & After Competition Maintenance.........30
Between Motos & Practice Maintenance .....30
After Competition Maintenance ...................30
Service Preparations
Maintenance Component Locations...................32
Seat ....................................................................33
Fuel Tank ...........................................................34
Subframe ...........................................................36
Service Procedures
Fluids & Filters
Fuel System........................................................40
Engine Oil ..........................................................49
Transmission Oil ................................................52
Coolant ...............................................................54
Air Cleaner .........................................................56
Crankcase Breather ............................................58
Engine
Throttle ...............................................................59
Engine Idle Speed ..............................................61
Clutch System ....................................................62
Spark Plug ..........................................................67
Valve Clearance..................................................68
Piston/Piston Rings/Piston Pin...........................76
Chassis
Suspension..........................................................85
Front Suspension Inspection ...........................85
Rear Suspension Inspection ............................86
Recommended Fork Oil ..................................87
Fork Oil Change..............................................87
Brakes.................................................................90
Wheels................................................................94
Tires & Tubes .....................................................95
Drive Chain ........................................................97
Exhaust Pipe/Muffler .......................................100
Steering Damper...............................................103
Additional Maintenance Procedures ................105
Appearance Care ..............................................107
22 Servicing Your Honda
The Importance of Maintenance
Keeping your CRF well-maintained is absolutely
essential to your safety. It’s also a good way to
get maximum performance during each moto.
Careful pre-ride inspections and good
maintenance are especially important because
your CRF is designed to be ridden in of f-road
competition.
Remember, proper maintenance is your
responsibility. Be sure to inspect your CRF
before each ride and follow the Maintenance
Schedule in this section.
WARNING
Improperly maintaining this motorcycle or
failing to correct a problem before you
ride can cause a crash in which you can
be seriously hurt or killed.
Always follow the inspection and
maintenance recommendations and
schedules in this owner’s manual.
Servicing Your Honda 23
Maintenance Safety
This section includes instructions on how to
perform some important maintenance tasks.
Some of the most important safety precautions
follow. However, we cannot warn you of every
conceivable hazard that can arise in performing
maintenance. Only you can decide whether or
not you should perform a given task.
Important Safety Precautions
• Make sure the engine is off before you begin
any maintenance or repairs.
This will help eliminate several potential
hazards:
Carbon monoxide poisoning from engine
exhaust.
Be sure there is adequate ventilation
whenever you operate the engine.
Burns from hot motorcycle parts. Let the
engine and exhaust system cool before
touching.
Injury from moving parts. Do not run the
engine unless instructed to do so.
• Read the instructions before you begin, and
make sure you have the tools and skills
required.
• To help prevent the motorcycle from falling
over, park it on a firm, level surface, using an
optional workstand or a maintenance stand to
provide support.
• To reduce the possibility of a fire or
explosion, be careful when working around
gasoline. Use only a non-flammable (high
flash point) solvent such as kerosene — not
gasoline — to clean parts. Keep cigarettes,
sparks, and flames away from all fuel-related
parts.
WARNING
Failure to properly follow maintenance
instructions and precautions can cause
you to be seriously hurt or killed.
Always follow the procedures and
precautions in this owner’s manual.
24 Servicing Your Honda
Maintenance Schedule
To maintain the safety and reliability of your
CRF, regular inspection and service is required as
shown in the Maintenance Schedule that follows.
The Maintenance Schedule list items that can be
performed with basic mechanical skills and hand
tools. Procedures for these items are provided in
this manual.
The Maintenance Schedule also includes items
that involve more extensive procedures and may
require special training, tools, and equipment.
Therefore, we recommend that you have your
dealer perform these tasks unless you have
advanced mechanical skills and the required
tools. Procedures for items in this schedule are
provided in an official Honda Service Manual
available for purchase from your dealer (page
160).
Service intervals in the maintenance schedule are
expressed in terms of races and riding hours. To
avoid overlooking required service, we urge you
to develop a convenient way to record the
number of races and/or hours you ride.
If you do not feel capable of performing a given
task or need assistance, remember that your
Honda dealer knows your CRF best and is fully
equipped to maintain and repair it. If you decide
to do your own maintenance, use only Honda
Genuine Parts or their equivalents for repair or
replacement to ensure the best quality and
reliability.
Perform the pre-ride inspection (page 13) at each
scheduled maintenance period.
Summary of Maintenance Schedule Notes and
Procedures:
Notes:
1. Clean after every moto for dusty riding
condition.
2. Replace every 2 years. Replacement requires
mechanical skill.
3. Replace after the first break-in ride.
4. Inspect after the first break-in ride.
5. Replace the transmission oil, if the clutch
discs and plates are replaced.
6. Replace every year.
Maintenance Procedures:
I: inspect and clean, adjust, lubricate or replace
if necessary
C: clean
A: adjust
L: lubricate
R: replace
Servicing Your Honda 25
Maintenance Schedule
ITEMS
FUEL LINE
FUEL PUMP FILTER
THROTTLE OPERATION
AIR FILTER
CRANKCASE BREATHER
SPARK PLUG
VALVE CLEARANCE
ENGINE OIL
ENGINE OIL FILTER
ENGINE IDLE SPEED
PISTON AND PISTON RINGS
PISTON PIN
TRANSMISSION OIL
RADIATOR COOLANT
COOLING SYSTEM
DRIVE CHAIN
DRIVE CHAIN SLIDER
DRIVE CHAIN ROLLER
DRIVE SPROCKET
DRIVEN SPROCKET
BRAKE FLUID
BRAKE PADS WEAR
BRAKE SYSTEM
CLUTCH SYSTEM
CONTROL CABLES
EXHAUST PIPE/MUFFLER
SUSPENSION
SWINGARM/SHOCK LINKAGE
FORK OIL EXCEPT DAMPER
FORK OIL DAMPER
NUTS, BOLTS, FASTENERS
WHEELS/TIRES
STEERING HEAD BEARINGS
(NOTE 6)
(NOTE 6)
(NOTE 1)
(NOTE 4)
(NOTE 3)
(NOTE 3)
(NOTE 5)
(NOTE 2)
(NOTE 2)
(NOTE 5)
(NOTE 3)
I
I
C
I
I
I
I
I
I
I
I, L
I
I
I
I
I
I
I
I
I, L
I
I
I
I
40
44
60
56
58
67
68-75
49
50
61
79
80
52
54
54
97-99
97
98
99
99
91
93
90
62
105
100
85, 86
86
87
115
106, 150-152
94-96
105
R
L
R
I
R
R
R
R
R
R
R
R
I
FREQUENCY
NOTE Ref. Page
Each race
or about
2.5 hours
Every 3 races
or about
7.5 hours
Every 6 races
or about
15.0 hours
Every 9 races
or about
22.5 hours
Every 12 races
or about
30.0 hours
WE RECOMMENDED THESE ITEMS BE SERVICED BY REFERRING TO AN OFFICIAL HONDA SERVICE MANUAL.
This maintenance schedule is based upon average riding condition. Machine subjected to severe use require more frequent servicing.
NOTE: 1.Clean after every moto for dusty riding condition.
2.Replace every 2 years. Replacement requires mechanical skill.
3.Replace after the first break-in ride.
4.Inspect after the first break-in ride.
5.Replace the transmission oil, if the clutch discs and plates are replaced.
6.Replace every year.
Perform the Pre-ride Inspection (page 13) at each scheduled maintenance period.
I: Inspect and Clean, Adjust, Lubricate or Replace if necessary. C: Clean. A: Adjust. L: Lubricate. R: Replace.
26 Servicing Your Honda
General Competition Maintenance
Perform maintenance on firm, level ground using
the optional workstand, or equivalent support.
When tightening bolts, nuts or screws, start with
the larger diameter or inner fasteners, and tighten
them to the specified torque using a crisscross
pattern.
Use Honda Genuine Parts or their equivalent
when servicing your CRF.
Clean parts in non-flammable (high flash point)
cleaning solvent (such as kerosene) when
disassembling. Lubricate any sliding surface,
O-rings, and seals before reassembling. Grease
parts by coating or filling where specified.
After any engine disassembly, always install new
gaskets, O-rings, cotter pins, piston pin clips,
snap rings, etc. when reassembling. After
reassembly, check all parts for proper installation
and operation.
All Pre-ride Inspection Items
Refer to Pre-ride Inspection page 13.
Spark Plug
Some non-resistor plugs may cause ignition problems. Refer
to the recommendations elsewhere in this manual for specific
types so you will be sure to use the proper reach and heat
range. Replace periodically as specified in the Maintenance
Schedule. (page 25).
Engine Oil and Filter
Drain and replace the engine oil often to ensure the greatest
service life of the piston, cylinder and crankshaft.
Also replace the engine oil filter often to ensure the greatest
service life. Frequent oil changes will also assure consistent
engine power and response. (page 50).
Air Cleaner
Clean and oil your air cleaner regularly because the volume
of air able to pass through it has a great effect on
performance. Both engine performance and long-term
durability may be affected by an air cleaner that has
deteriorated and allows dirt to pass through it. Inspect the air
cleaner closely each time it’s serviced for evidence of small
tears or seam separation. Keep a spare air cleaner oiled and
ready to install, sealed in a plastic bag. Riding in dusty
conditions may require servicing the air cleaner or replacing
it with a pre-serviced air cleaner between motos. Be careful
not to over oil the air cleaner. While it is important to oil the
air cleaner thoroughly, over oiling will cause an overall rich
running condition, probably more noticeable off idle and in
low-rpm performance. Follow the servicing instructions in
the Maintenance section. Use Pro Honda Foam Filter Oil or
an equivalent. Be sure to grease the air cleaner flange where
it contacts the air cleaner housing. Pro Honda White
Lithium Grease, or an equivalent, is handy for this because
any dirt that penetrates this sealing area will show up clearly
(page 56).
Use a Honda Genuine air cleaner or an equivalent air cleaner
specified for your model.
Using the wrong Honda air cleaner or a non-Honda air
cleaner which is not of equivalent quality may cause
premature engine wear or performance problems.
Transmission Oil
Drain and replace the transmission oil often to ensure the
greatest service life of the transmission and clutch. Frequent
changes will also assure consistent shifting and clutch
performance (page 53).
Air cleaner Housing Sealing
Remove and reseal the air cleaner housing boot where it
connects to the air cleaner housing with Pro Honda Handgrip
Cement or an equivalent if there is any doubt to its sealing
integrity. Inspect the air cleaner and air intake tract regularly
for signs of deterioration or dirt penetration.
Spark Plug Cap
Install a small plastic tie-wrap around the spark plug cap to
reduce any possibility of it loosening or of water
penetration.
Servicing Your Honda 27
General Competition Maintenance
28 Servicing Your Honda
General Competition Maintenance
Gaskets
Always use new gaskets when reassembling components.
Cylinder Removal
Put a little grease on the cylinder mounting dowels to
prevent corrosion from dissimilar metals. The tolerances are
extremely tight, so it’s important to keep these dowels
absolutely clean (pages 76, 79).
Engine Mounting Bolts and Nuts
Make sure the engine mounting bolts and nuts are tightened
to the proper torque specification. For added peace of mind,
remove the nuts, clean the threads, and apply Pro Honda
Hondalock or an equivalent before torquing the nuts.
Electrical Connectors
Clean electrical connectors and wrap them with electrical
tape to reduce the possibility of unwanted disconnections,
water shorts or corrosion. For additional corrosion
protection, apply Pro Honda Dielectric Grease to allthe
electrical connections.
Steering Head Bearings
Periodically clean, inspect and regrease the steering head
bearings — especially if wet, muddy or extremely dusty
courses are encountered often.
Use urea based multi-purpose grease designed for high
temperature, high pressure performance (example:
EXCELITE EP2 manufactured by KYODO YUSHI, Japan
or Shell Stamina EP2 or equivalent).
Fork Oil/Performance
Disassemble, clean and inspect the front fork and replace oil
regularly. Contamination due to the tiny metal particles
produced from the normal action of the fork, as well as
normal oil breakdown, will deteriorate the performance of
the suspension. Refer to the Honda Service Manual. Use
only HP Fork Oil, SS-19 or equivalent which contains
special additives to assure maximum performance of your
CRF’s front suspension.
Frame
Because your CRF is a high-performance machine, the frame
should not be overlooked as part of your overall competition
maintenance program. Periodically inspect the frame
closely for possible cracking or other damage. It makes
good racing sense.
Spokes
Check spoke tension frequently between the first few rides.
As the spokes, spoke nuts and rim contact points seat-in, the
spokes may need to be retightened. Once past this initial
seating-in period, the spokes should hold their tension. Still,
be sure your race maintenance program includes checking
spoke tension and overall wheel condition on a regular basis
(page 94).
Nuts, Bolts, Etc
Application of a thread locking agent to essential fasteners
offers added assurance and security. Remove the nuts, clean
the threads of both the nuts and bolts, apply Pro Honda
Hondalock or an equivalent and tighten to the specified
torque.
Fuel Line
Refer to Fuel System on page 40.
Check the fuel line for deterioration, damage, or leakage.
Replace the fuel line every year.
Bleed Hole
After every race, check the bleed hole below the water pump
cover for leakage. Clean away any clogged dirt or sand, if
necessary. Check for signs of seal leakage. A small amount
of “coolant weeping” from the bleed hole is normal. If water
leaks through the bleed hole, the mechanical seal is
damaged. If oil leaks through the bleed hole, the oil seal is
damaged. See an official Honda Service Manual or consult
your dealer for replacing the mechanical seal or oil seal.
Both seals should be replaced at the same time.
Suspension Linkage Lubrication
Disassemble, clean, inspect and lubricate all suspension
linkage pivot bearings with grease after each 7.5 hours of
running time in order to maintain proper suspension
performance and minimize component wear.
Swingarm Pivot Lubrication
Clean, inspect and lubricate swingarm and suspension
linkage pivots with grease. Be sure all of the dust seals are
in good condition.
Swingarm
Do not attempt to weld or otherwise repair a damaged
swingarm. Welding will weaken the swingarm.
Footpegs
Worn footpeg teeth can be repaired by filing the grooves
between the teeth with a triangular-shaped file.
Be aware that filing them too sharp will reduce boot sole
lifespan. Sharpen only the points of the teeth. Filing the
grooves deeper will weaken the footpegs. Be sure the pegs
are free to pivot freely and that the pivot pin retaining cotter
pins are in good condition.
Brake Fluid Replacement
Refer to Brake Pad Wear in your Owner’s Manual, page 93.
Brake Caliper Inspection: Be sure both the front and rear
calipers are able to move freely on the caliper bracket pins.
Check pad thickness periodically and replace the pads when
minimum thickness is reached. If the brakes fade when they
are hot, inspect the pads for glazing or damage, and replace
if necessary.
Brake Fluid Replacement: Refer to the Honda Service
Manual (page 160) for brake fluid replacement instructions.
Replace the hydraulic fluid in the brake system every 2
years. Replace the fluid more frequently if you subject your
brakes to severe use. Heavy braking heats the brake fluid
and it may deteriorate sooner than expected. Any type of
riding that requires frequent use of the brakes, such as in
tight woods, can shorten the service life of brake fluid.
Handgrips
Always use Pro Honda Handgrip Cement when replacing
handgrips.
Throttle Grip
Align the index mark on the throttle grip with the edge of the
throttle cable guide. Left handlebar grip: Align the “∆” mark
on the left handlebar grip with the paint mark on the
handlebar.
Refer to the Service Manual for installation
instructions.
For added security, you may choose to bind the hand grips to
the handlebar and throttle pipe with safety wires to prevent
the possibility of them loosening. Position the twisted wire
ends away from your palms and be sure to bend the wire
ends well into the handgrip rubber so they will not snag your
glove.
Throttle Control
Remove the throttle control every few rides, clean the inside
of the throttle pipe and the handlebar thoroughly. Inspect the
cable carefully for kinks or other damage that may restrict
throttle control in any way. Move the handlebar from lock to
lock to be sure there is no cable interference. Make certain
the throttle operation is perfect after servicing and
inspecting.
Servicing Your Honda 29
General Competition Maintenance
30 Servicing Your Honda
Before & After Competition Maintenance
Between Motos & Practice Maintenance
After practice or between motos you have a
chance to make additional checks and
adjustments.
• Clean accumulated dirt from under the
fenders and off the wheels, suspension
components, handgrips, controls, and
footpegs. A stiff, nylon parts cleaning brush
works well.
• Check tire air pressure.
•
Check spoke tension, and make sure the rim
locks are secure.
• Check to make sure the sprocket bolts and
nuts are secure.
• Clean the sides of the drive chain with a stif f,
nylon parts-cleaning brush. Lubricate and
adjust the chain as necessary.
Do not perform maintenance while the engine
is running.
Injury to your fingers or hands may result.
• After adjustment, check that the chain adjuster
index marks (1) are in the same position on
each side. This will ensure that the rear wheel
is in proper alignment and allow
maximum performance from the rear disc
brake. Maintaining proper wheel alignment
will also extend brake pad wear.
(1)
(2)
After Competition Maintenance
It is important to the long-term performance of
your CRF to practice a consistent maintenance
program. Right after the event is a good time to
begin your next maintenance cycle.
After Race Lubrication
Apply a light coating of rust-inhibiting oil to the
drive sprocket and any steel portions of the
chassis or engine where the paint has worn away.
This will prevent rusting of the exposed metal.
Apply rust-inhibiting oil more heavily if the
event was particularly wet or muddy. Take care
to avoid spraying any oil near the brake pads or
brake disc.
Take care to prevent catching your fingers
between the chain and sprocket.
Remove the drive chain, clean and lubricate it.
Be sure the chain is wiped clean and is dry
before lubricating it.
(2) pressure release screw
(1) chain adjuster index marks
• Suspend the front wheel above the ground and
use the pressure release screws (2) to release
the built-up pressure (in excess of normal
atmospheric pressure: 0 psi (0 kPa, 0 kgf/cm
2
))
in the fork tubes. This pressure is caused by
normal fork action while riding. (If you are
riding at altitude, remember that fork pressure
of 0 at sea level will increase as elevation
increases.)
Servicing Your Honda 31
Before & After Competition Maintenance
Routine Cleaning
If your CRF is only slightly dirty, it is best to
clean it by hand with the aid of a stif f bristled
nylon brush and some clean rags.
Take care to prevent catching your fingers
between the chain and sprocket.
A variety of reasonably priced cleaning brushes
are available from variety, drug, food, and
hardware stores. Some of these brushes are
extremely useful in removing dirt from the many
tight contours of the metal pieces of your CRF.
Avoid using stiff, abrasive brushes on the plastic
or rubber parts.
If your CRF was exposed to sea air or salt water ,
rinse it off as soon as possible after the event, dry
it, and apply a spray lubricant to all metal parts.
If you decide to wash your CRF or use cleaners,
refer to
Appearance Care (page 107).
32 Servicing Your Honda
Maintenance Component Locations
front brake caliper
crankcase breather tube
drive chain
transmission oil
drain bolt
engine oil drain bolt
fast idle knob
(engine idle speed)
engine oil filter
engine oil fill cap/
dipstick
air cleaner
rear brake
caliper
rear suspension
rebound damping adjuster
transmission
oil fill cap
transmission
oil check bolt
rear brake pedal
front suspension rebound
damping adjuster
rear suspension high speed
compression damping adjuster
rear suspension low speed
compression damping adjuster
front suspension compression
damping adjuster
spark plug
steering damper
adjuster
rear suspension
spring pre-load
adjuster
rear brake fluid
reservoir
clutch lever
front brake fluid reservoir
front brake lever
fuel fill cap
radiator cap
throttle grip
Servicing Your Honda 33
Seat
Refer to Safety Precautions on page 23.
Removal
1. Remove the seat mounting bolts (1).
2. Remove the seat (2) by sliding it backward.
(1) seat mounting bolts (2) seat
Installation
1. Install the seat while aligning the seat front
prong (1) with the seat bracket (2) and seat
rear prong (3) with the ECM bracket (4).
2. Install and tighten the seat mounting bolts to
the specified torque:
19 lbf·ft (26 N·m, 2.7 kgf·m)
(1) seat front prong
(2) seat bracket
(3) seat rear prong
(4) ECM bracket
(2)
(1)
(2)
(1)
(3)
(4)
34 Servicing Your Honda
Fuel Tank
Refer to Safety Precautions on page 23.
Removal
1. Remove the seat (page 33).
2. Remove the shroud A bolts and collars (1).
3. Remove the shroud B bolts (2) and shrouds (3).
7. Remove the fuel tank bolt and collar (7).
WARNING
Gasoline is highly flammable and
explosive. You can be burned or seriously
injured when handling fuel.
• Stop the engine and keep heat, sparks
and flame away.
• Handle fuel only outdoors.
• Wipe up spills immediately.
(8) fuel feed hose (11) fuel tank stopper cable
(10) fuel tank
10. Check for interference between the frame and
tank and adjust the cushion rubbers (12) if
necessary.
(1) shroud A bolts and collars (3) shrouds
(2) shroud B bolts
4. Install a hose clamp (4) to the breather tube
(5) and shut the hose clamp securely
(4) hose clamp (5) breather tube
5. Pull the breather tube (5) out of steering stem
nut.
6. Unhook the fuel tank band (6).
(5) breather tube
(6) fuel tank band
(7) fuel tank bolt and collar
8. Unhook the fuel feed hose (8) from the clamp
(9).
(12)
2.4 in (60 mm)
(12) cushion rubbers
(8) fuel feed hose (9) clamp
9. Pull the fuel tank (10) out of the frame and
hang it to the left of the frame.
Check the fuel tank stopper cable (11) for
deterioration, kinks or other damage.
Do not support the fuel tank by the fuel feed
hose (8).
(3)
(2)
(1)
(5)
(4)
(5)
(7)
(6)
(8)
(9)
(8)
(11)
(10)
Servicing Your Honda 35
Fuel Tank
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
Installation
1. Install the fuel feed hose (1) to the clamp (2)
if it is removed.
(1) fuel feed hose (2) clamp
2. Install the fuel tank (3) on the frame.
3. Install the collar and fuel tank bolt (4).
4. Hook the fuel tank band (5).
5. Put the breather tube (6) in the steering stem
nut (7).
6. Remove the hose clamp (8) from the breather
tube.
(6) breather tube (8) hose clamp
(7) steering stem nut
7. Install the shrouds (9) by aligning shroud tabs
(10) with the air cleaner housing cover tabs
(11).
(3) fuel tank (5) fuel tank band
(4) collar and fuel tank bolt
(9)
(12)
(13)
(10)
(11)
(9) shrouds
(10) shroud tabs
(11) air cleaner housing cover tabs
(12) shroud B bolts
(13) collars and shroud A bolts
8. Install the shroud B bolts (12), collars and
shroud A bolts (13).
Tighten the shroud B bolts to the specified
torque:
3.7 lbf·ft (5 N·m, 0.5 kgf·m)
9. Install the seat (page 33).
36 Servicing Your Honda
Subframe
Refer to Safety Precautions on page 23.
Removal
1. Remove the side covers (1) by removing the
seat mounting bolts (2) and bolts (3).
2. Remove the seat (4).
(1) side covers (3) bolts
(2) seat mounting bolts (4) seat
3. Loosen the muffler clamp bolt (5).
(3)
(4)
(2)
(1)
(5) muffler clamp bolt
(5)
(15)
(16)
4. Remove the muffler mounting A bolt (6),
muffler mounting B bolt (7), washer A (8),
washer B (9) and muffler (10).
(6) muffler mounting A bolt (9) washer B
(7) muffler mounting B bolt (10) muffler
(8) washer A
5. Disconnect the IAT sensor connector (11).
6. Remove the ECM mounting rubber (12) from
the ECM bracket (13).
Unhook the fuel tank band (14).
(12) ECM mounting rubber
(13) ECM bracket
(14) fuel tank band
7. Loosen the screw (15) on the air cleaner
connecting tube clamp (16).
(15) screw
(16) air cleaner connecting tube clamp
(6)
(7)
(8)
(9)
(10)
(12)
(14)
(13)
(11) IAT sensor connector
(11)
Servicing Your Honda 37
Subframe
8. Remove the right subframe lower bolt (17)
and left subframe lower bolt (18).
Remove the subframe upper bolts (19).
(17) right subframe lower bolt
(18) left subframe lower bolt
(19) subframe upper bolts
9. Slightly pull the subframe (20) backward and
disconnect the crankcase breather tube (21)
from the air cleaner connecting tube.
Remove the subframe.
Be careful not to damage the ECM and wires.
(20) subframe
(21) crankcase breather tube
Right side:
(19)
(19)
(17)
(18)
Left side:
(21)
(20)
(1)
(1) crankcase breather tube
2. Position the ECM (2) in the bracket (3).
3. Align the shroud tabs (4) with the air cleaner
housing cover tabs (5).
4. Loosely attach the upper and lower end of the
subframe to the main frame while connecting
the air cleaner connecting tube (6) to the
throttle body (7).
5. Loosely install all subframe bolts.
Installation
1. Connect the crankcase breather tube (1).
(2) ECM (5) air cleaner housing cover tabs
(3) bracket (6) air cleaner connecting tube
(4) shroud tabs (7) throttle body
(2)
(3)
(7)
(6)
(5)
(4)
6. Align the subframe with the rear wheel and
tighten the subframe upper bolts (8), left
subframe lower bolt (9) and right subframe
lower bolt (10) to the specified torque:
subframe upper bolts:
24 lbf·ft (33 N·m, 3.4 kgf·m)
left subframe lower bolt:
24 lbf·ft (33 N·m, 3.4 kgf·m)
right subframe lower bolt:
36 lbf·ft (49 N·m, 5.0 kgf·m)
(8) subframe upper bolts
(9) left subframe lower bolt
(10) right subframe lower bolt
Right side:
(8)
(10)
(9)
Left side:
(8)
(cont’d)
38 Servicing Your Honda
Subframe
7. Make sure the air cleaner connecting tube tab
(11) aligns with the air cleaner connecting
tube clamp hole (12).
(11) air cleaner connecting tube tab
(12) air cleaner connecting tube clamp hole
8. Tighten the screw (13) on the air cleaner
connecting tube clamp to the specified torque:
0.5 lbf·ft (0.7 N·m, 0.1 kgf·m)
Check the distance between the band ends is
0.18 ± 0.06 in (4.5 ± 1.5 mm).
(11)
(12)
9. Hook the fuel tank band (14).
Install the ECM mounting rubber (15) to the
ECM bracket (16).
(14) fuel tank band
(15) ECM mounting rubber
(16) ECM bracket
(15)
(14)
(16)
(18) muffler clamp (20) exhaust pipe
(19) gasket (new)
13. Install the muffler (21).
14. Install the muffler clamp (18) by aligning the
tab (22) of the muffler clamp with the cutout
(23) of the muffler.
(18)
(19)
(20)
(13) screw
(13)
0.18 ± 0.06 in
(4.5 ± 1.5 mm)
(17) IAT sensor connector
(17)
(18) muffler clamp (22) tab
(21) muffler (23) cutout
(23)
(21)
(22)
(18)
11. Remove the old gasket from exhaust pipe.
12. Install the muffler clamp (18) and a new
gasket (19) to the exhaust pipe (20).
10. Connect the IAT sensor connector (17).
Servicing Your Honda 39
Subframe
15. Install the washer A (24), washer B (25),
muffler mounting B bolt (26) and muffler
mounting A bolt (27).
(24) washer A
(25) washer B
(26) muffler mounting B bolt
(27) muffler mounting A bolt
16. Tighten the muffler clamp bolt (28) to the
specified torque:
15 lbf·ft (21 N·m, 2.1 kgf·m)
(27)
(26)
(24)
(25)
17. Tighten the muffler mounting B bolt (26) and
muffler mounting A bolt (27) to the specified
torque:
19 lbf·ft (26 N·m, 2.7 kgf·m)
18. Install the seat (29).
19. Install the side covers (30), seat mounting
bolts (31) and bolts (32). Then tighten the seat
mounting bolts and side cover bolts to the
specified torque:
seat mounting bolts:
19 lbf·ft (26 N·m, 2.7 kgf·m)
side cover bolts:
7 lbf·ft (10 N·m, 1.0 kgf·m)
(26) muffler mounting B bolt
(27) muffler mounting A bolt
(29) seat
(30) side covers
(31) seat mounting bolts
(32) bolts
(31)
(30)
(32)
(27)
(29)
(26)
(28) muffler clamp bolt
(28)
Refer to Safety Precautions on page 23.
Fuel
Type Unleaded
Pump Octane Number 91 (or higher)
40 Servicing Your Honda
Fuel System
Refueling Procedure
1. To open the fuel fill cap (1), pull the breather
tube (2) out of the steering stem nut (3). Turn
the fuel fill cap counterclockwise and remove
it.
(1) fuel fill cap (3) steering stem nut
(2) breather tube
2. Add fuel until the level reaches the bottom of
the filler neck.
Fuel Tank Capacity:
1.5 US gal (5.7R)
Be careful not to damage the fuel pump while
filling the fuel tank.
Avoid overfilling the tank. There should be no
fuel in the filler neck.
WARNING
Gasoline is highly flammable and
explosive. You can be burned or
seriously injured when handling fuel.
• Stop the engine and keep heat, sparks
and flame away.
• Handle fuel only outdoors.
• Wipe up spills immediately.
(1) fuel quick connect fitting cover
(2) fuel line
(3)
(2)
(1)
(1)
(2)
3. Close the fuel fill cap and insert the breather
tube in the steering stem nut.
Fuel Line
1. Hang the fuel tank to the left side of the frame
(page 34).
2. Remove the fuel quick connect fitting cover
(1).
3. Check the fuel line (2) for cracks,
deterioration, damage or leakage. Replace the
fuel line, if necessary.
4. Install the fuel quick connect fitting cover.
5. Install the fuel tank (page 35).
Use only unleaded fuel in your Honda. If you
ride your Honda in a country where leaded fuel
might be available, take precautions to use only
unleaded fuel.
Your engine is designed to use any unleaded
gasoline that has a pump octane number of 91 or
higher. Gasoline pumps at service stations
normally display the pump octane number. For
information on the use of oxygenated fuels, see
page 153.
Use of lower octane gasoline can cause persistent
“pinging” or “spark knock” (a louder rapping
noise) which, if severe, can lead to engine
damage. (Light pinging experienced while
operating under a heavy load, such as climbing a
hill, is no cause for concern.)
If pinging or spark knock occurs at a steady
engine speed under normal load, change brands
of gasoline. If pinging or spark knock persists,
consult your dealer.
Never use stale or contaminated gasoline. Avoid
getting dirt, dust or water in the fuel tank.
Dirty fuel will clog the fuel pump filter and can
damage the fuel pump. Commercially available
fuel straining devices may reduce the occurrence
of dirty fuel.
Servicing Your Honda 41
Fuel System
Fuel Pressure Relieving
1. Disconnect the fuel pump sub-harness
connector (1).
(1) fuel quick connect fitting cover
(2) fuel pump
(3) fuel quick connect fitting
5. Remove the bolt (4), clamp and setting rubber
(5).
(2)
(1)
Injector side: Fuel Pump side:
(3)
(1)
Fuel Line Replacement
Disconnection
1. Relieve the fuel pressure (this page).
2. Hang the fuel tank to the left side of the frame
(page 34).
3. Remove the fuel quick connect fitting cover
(1) from the fuel pump (2).
4. Check the fuel quick connect fitting (3) for
dirt, and clean if necessary.
(1) fuel pump sub-harness connector
2. Start the engine and let it idle until the engine
stalls.
(5)
(4)
6. Pull and release the joint rubber (6) of the
injector side from the retainer (7).
(6) joint rubber (injector side only)
(7) retainer
7. Place a shop towel (8) over the fuel quick
connect fitting.
(6)
(7)
(8) shop towel
Injector side: Fuel Pump side:
(8)
(cont’d)
(4) bolt (5) clamp and setting rubber
42 Servicing Your Honda
Fuel System
8. Hold the connector with one hand and squeeze
the retainer tabs (9) with the other hand to
remove them from the locking pawls (10).
Pull the connector off, then remove the retainer.
• Use a shop towel to absorb the remaining
fuel in the fuel feed hose.
• Be careful not to damage the hose or other
parts.
• Do not use tools.
• If the connector does not move, keep the
retainer tabs pressed down, and alternately
pull and push the connector until it comes
off easily.
(9) retainer tabs
(10) locking pawls
WARNING
Gasoline is highly flammable and
explosive. You can be burned or
seriously injured when handling fuel.
• Stop the engine and keep heat, sparks
and flame away.
• Handle fuel only outdoors.
• Wipe up spills immediately.
Injector side: Fuel Pump side:
(9)
(9)
(10)
(10)
9. To prevent damage and keep foreign matter
out, cover the disconnected connectors (11)
and fuel joints (12) with plastic bags (13).
(11) disconnected connector
(12) fuel joint
(13) plastic bags
(13)
(12)
(11)
Connection
1. Insert a new retainer (1) into the connector (2)
by aligning its locking pawls (3) with the
connector grooves (4).
• Always replace the retainer of the quick
connect fitting when the fuel feed hose is
disconnected.
• If the joint rubber is damaged or cut, replace
it with a new one.
• Do not bend or twist the fuel feed hose.
• If any retainer needs replacing, use the same
manufacture’s retainer as the ones being
removed (The various manufacture’s feature
different retainer specification).
(1) retainer (new) (3) locking pawls
(2) connector (4) connector grooves
(2)
(4)
Align
(1)
(3)
Servicing Your Honda 43
Fuel System
2. Install the joint rubber (5) and seat it onto the
fuel joint as shown. Align the fuel quick
connect fitting with the fuel joint. Then press
the quick fitting onto the pipe of the fuel joint
until both retainer pawls lock with a “click”.
If it is hard to connect, put a small amount of
engine oil on the pipe end.
(5) joint rubber (injector side only)
(5)
3. Make sure the connection is secure and that
the pawls are firmly locked into place; check
visually and by pulling the connector.
4. Make sure the joint rubber (5) is in place
between the flange (6) and retainer tab (7).
(5) joint rubber (injector side only)
(6) flange
(7) retainer tab
5. Install the rubber (8), clamp (9) and bolt (10)
by aligning the clamp tab (11) with the groove
(12) of the stay.
(5)
(7)
(6)
6. Install the fuel quick connect fitting cover
(13) and set the rubber cover tab (14) to the
hole (15) of the fuel quick connect fitting
cover.
Be sure the rubber cover (16) is properly
installed between the fuel quick connect fitting
cover and fuel pump.
(13) fuel quick connect fitting cover
(14) rubber cover tab
(15) fuel quick connect fitting cover hole
(16) rubber cover
7. Install the fuel tank (page 35).
8. Increase the fuel pressure (page 48).
(13)
(15)
(14)
(16)
(8) rubber (11) clamp tab
(9) clamp (12) groove
(10) bolt
(10)
(11)
(12)
(9)
(8)
44 Servicing Your Honda
Fuel System
Fuel Pump Filter Replacement
Empty the fuel tank into an approved gasoline
container using a commercially available hand
siphon or an equivalent method.
Be careful not to damage the fuel pump while
draining the fuel in the fuel tank.
WARNING
Gasoline is highly flammable and
explosive. You can be burned or
seriously injured when handling fuel.
• Stop the engine and keep heat, sparks
and flame away.
• Handle fuel only outdoors.
• Wipe up spills immediately.
Removal
1. Relieve the fuel pressure (page 41).
2. Disconnect the fuel line (page 41).
3. Remove the fuel pump mounting bolts (1),
stopper cable guide (2), stopper cable (3),
washers (4), collars (5), conical spring
washers (6) and fuel pump plate (7) while
holding the fuel tank.
4. Remove the fuel tank.
Be careful not to drop the fuel tank when
removing the stopper cable.
(1) fuel pump mounting bolts
(2) stopper cable guide
(3) stopper cable
(4) washers
(5) collars
(6) conical spring washers
(7) fuel pump plate
5. Remove the fuel pump unit (8) and O-rings
(9).
Be careful not to damage the fuel pump unit.
(8) fuel pump unit (9) O-rings
6. Disconnect the fuel pump wire terminals (10)
from the fuel pump base (11).
Be careful not to damage the wires when
disconnecting the fuel pump wire terminals.
(10) fuel pump wire terminals
(11) fuel pump base
(7)
(6)
(5)
(4)
(1)
(3)
(2)
(8)
(9)
(11)
(10)
Servicing Your Honda 45
Fuel System
7. Check the hooks (12) of the fuel pump unit
holder and tabs (13) on the fuel pump base for
damage or discoloration.
If the hooks and tabs are damaged or
discolored, replace the fuel pump unit as an
assembly.
8. Release the hooks of the fuel pump unit
holder from the grooves (14) on the fuel pump
base tabs while pushing the holder against the
base and slightly spreading the base tabs.
Be careful not to damage the hooks and tabs.
9. Remove the fuel pump unit holder assembly
(15) from the fuel pump base (11) and remove
the O-ring (16).
Wipe the spilled out fuel immediately.
(11) fuel pump base
(15) fuel pump unit holder assembly
(16) O-ring
10. Remove the fuel pump stopper (17) and
damper rubber (18).
(12) hooks (14) grooves
(13) tabs
(17) fuel pump stopper
(18) damper rubber
11. Remove the fuel pump assembly (19) with
fuel pump filter (20), O-ring (21) from the
fuel pump unit holder (22).
(19) fuel pump assembly
(20) fuel pump filter
(21) O-ring
(22) fuel pump unit holder
12. Check the fuel pump filter (20) for clog,
damage or deterioration and replace if
necessary.
13. Remove the fuel pump filter from the fuel
pump assembly (20).
(19) fuel pump assembly (20) fuel pump filter
(12)
(13)
(14)
(13)(12) (14)
(15)
(16)
(11)
(17)
(18)
(22)
(21)
(19) (20)
(19)
(20)
46 Servicing Your Honda
Fuel System
Installation
1. Install a new fuel pump filter (1) onto the fuel
pump assembly (2) aligning its hook (3) with
the joint boss (4) completely.
Be careful not to damage the hook.
(1) new fuel pump filter (3) hook
(2) fuel pump assembly (4) joint boss
2. Apply a small amount of silicone grease to a
new O-ring (5).
Install a new O-ring to the fuel pump
assembly (2).
3. Install the fuel pump assembly with fuel pump
filter into the fuel pump unit holder (6) while
routing the fuel pump red (7) and black (8)
wires through the holder grooves (9) as
shown.
(2) fuel pump assembly (7) red wire
(5) O-ring (new) (8) black wire
(6) fuel pump unit holder (9) grooves
4. Install a new damper rubber (10) to the fuel
pump filter as shown.
Install the fuel pump stopper (11).
(10) damper rubber (new) (11) fuel pump stopper
5. Apply a small amount of silicone grease to a
new O-ring (12).
Install a new O-ring to the fuel pump base
(13).
6. Install the fuel pump unit holder assembly
(14) into the fuel pump base while aligning its
hooks (15) with the grooves (16) in the fuel
pump base tabs (17).
If the gap between the hooks and tabs is more
than 0.04 in (1.0 mm), replace the fuel pump
unit.
Be sure that the hooks are completely seated.
(12) O-ring (new)
(13) fuel pump base
(14) fuel pump unit holder assembly
(15) hooks
(16) grooves
(17) tabs
(2)
(3)
(4)
(1)
(9)
(9)
(6)
(8)
(8)
(7)
(7)
(9)
(9)
(5)
(2)
(10)
(11)
(12)
(13)
(14)
(15)
(16) (17)
Servicing Your Honda 47
7. Connect the fuel pump red (18) and black (19)
wire terminals to the fuel pump base terminals
(20).
Push the wire terminals until they stops as
shown.
Be careful not to damage the wires.
8. Apply 0.5 g maximum of engine oil to a new
O-ring (21).
Install a new O-ring onto the fuel pump unit
(22).
(18) red wire terminal
(19) black wire terminal
(20) fuel pump base terminals
(21) O-ring (new)
(22) fuel pump unit
9. Install a new O-ring (23) into the fuel tank
groove.
10. Install the fuel pump unit (24) into the fuel
tank (25).
Be careful not to damage the wires.
(23) O-ring (new) (25) fuel tank
(24) fuel pump unit
11. Install the fuel pump plate (26) with its
identification mark (27) facing toward the
front side and facing up.
(26) fuel pump plate (27) identification mark
12. Install the conical spring washers (28), collars
(29), washers (30), stopper cable (31), stopper
cable guide (32) and fuel pump mounting
bolts (33).
13. Install the fuel tank.
Make sure that the convex surface of the conical
spring washers are upside.
(28) conical spring washers
(29) collars
(30) washers
(31) stopper cable
(32) stopper cable guide
(33) fuel pump mounting bolts
14. Tighten the fuel pump mounting bolts to the
specified torque in the specified sequence as
shown.
8 lbf·ft (11 N·m, 1.1 kgf·m)
15. Connect the fuel line (page 42).
16. Increase the fuel pressure (page 48).
(21)
(18)
(18)
(19)
(19)
(22)
(20)
(24)
(23)(25)
(26)
(27)
(33)(29)(28)
(32)
(31)
(30) (33)(29)(28)
Fuel System
48 Servicing Your Honda
Fuel System
Fuel Pressure Increasing
Make sure the fuel remains enough (0.3 US gal
(1.0
r) minimum) in the fuel tank and add fuel if
necessary before increasing fuel pressure.
1. Connect the fuel pump sub-harness connector
(1).
(1) fuel pump sub-harness connector
2. Before connecting the battery harness cables
to a 12V battery, make sure that the battery
harness selector switches are OFF.
3. Connect the battery harness (2) and battery
harness adapter (3) between the main and
sub-harness as shown.
Connect the battery harness positive (+) cable
first, then connect the battery harness negative
(–) cable to a 12V battery terminals.
• Battery harness
070MZ-MEN0100
• Battery harness adapter 070MZ-KRN0100
(1)
(2) battery harness
(3) battery harness adapter
4. Position the fuel tank on the main frame.
5. Turn the “PUMP” selector switch (4) ON.
The selector switches can be used to change
power delivery as follows:
–“ECM” selector switch ON:
Power to ECM only.
–“PUMP” selector switch ON:
Power to fuel pump only.
– Both selector switches ON:
Power to ECM and fuel pump.
(2)
(3)
6. Run the fuel pump for about 3 – 5 seconds,
and fuel pressure will rise.
7. Turn the “PUMP” selector switch OFF.
Check that there is no leakage in the fuel line.
(4) “PUMP” selector switch
8. Remove the battery harness.
(4)
Servicing Your Honda 49
* Suggested 4-stroke engine oils are equal
performance to SJ oils that are not labeled as
energy conserving and resource conserving on
the circular API service label.
Engine Oil
Refer to Safety Precautions on page 23.
Using the proper oil, and regularly checking,
adding, and changing oil will help extend the
service life of the engine. Even the best oil wears
out. Changing oil helps get rid of dirt and
deposits. Operating the engine with old or dirty
oil can damage your engine. Running the engine
with insufficient oil can cause serious damage to
the engine.
Oil Recommendation
API
classification
SG or higher except oils
labeled as energy conserving
and resource conserving on
the circular API service label
suggested oil*
Pro Honda GN4 4-stroke oil
(USA & Canada), or Honda
4-stroke oil or an equivalent
motorcycle oil*
viscosity
(weight)
SAE 10W–30
JASO T 903 standard MA
• Your CRF does not need oil additives.
Use the recommended oil.
• Do not use API SH or higher 4-stroke engine
oils displaying the circular API “energy
conserving” and “resource conserving” service
label on the container. They may affect
lubrication.
Other viscosities shown in the following chart
may be used when the average temperature in
your riding area is within the indicated range.
JASO T 903 standard
The JASO T 903 standard is an index for engine
oils for 4-stroke motorcycle engines.
There are two classes: MA and MB.
Oil conforming to the standard is labeled on the
oil container. For example, the following label
shows the MA classification.
(1) oil code
(2) oil classification
(2)
(1)
(2)
50 Servicing Your Honda
Engine Oil
6. Check that the O-ring (4) is in good condition
and replace it if necessary.
7. Reinsert the engine oil fill cap/dipstick (1).
(1) engine oil fill cap/dipstick
(2) engine oil drain bolt
(3) sealing washer (new)
(1)
(3)
(2)
(1)
(1)
(3)
(2)
Changing Engine Oil & Filter
1. Run the engine at idle for 3 minutes, then shut
it off.
2. Support the CRF in an upright position on a
level surface.
3. Remove the engine oil fill cap/dipstick (1)
from the left crankcase cover.
4. Place an oil drain pan under the engine to
catch the oil. Then remove the engine oil
drain bolt (2) and sealing washer (3).
5. With the engine stop button pushed, repeat
kickstarter operation approximately five times
to drain the engine oil completely.
6. After the oil has drained, apply engine oil to
the drain bolt threads and tighten it with a
new sealing washer to the specified torque:
12 lbf·ft (16 N·m, 1.6 kgf·m)
Pour the drained oil into a suitable container and
dispose of it in an approved manner (page 144).
Improper disposal of drained fluids is harmful to
the environment.
NOTICE
Checking & Adding Oil
1. Run the engine at idle for 3 minutes, then shut
it off.
2. Wait 3 minutes after shutting off the engine to
allow the oil to properly distribute itself in the
engine.
3. Support the CRF in an upright position on a
level surface.
4. Remove the engine oil fill cap/dipstick (1),
wipe it clean, and insert the engine oil fill
cap/dipstick without screwing it in. Remove
the oil fill cap/dipstick.
5. Check that the oil level is between the upper
(2) and lower (3) level marks on the engine oil
fill cap/dipstick.
• If the oil is at or near the upper level mark,
you do not have to add oil.
• If the oil is below or near the lower level
mark, add the recommended oil until it
reaches the upper level mark. (Do not
overfill)
Reinstall the engine oil fill cap/dipstick.
Repeat steps 1–5.
(1) engine oil fill cap/dipstick
(2) upper level mark
(3) lower level mark
(1)
(4)
(1) engine oil fill cap/dipstick
(4) O-ring
8. Check for oil leaks.
Servicing Your Honda 51
Engine Oil
If the oil filter is not installed properly, it will
cause serious engine damage.
12. Apply engine oil to a new O-ring and install it
to the oil filter cover.
13. Install the oil filter cover being careful not to
damage the O-ring, then tighten the oil filter
cover bolts to the specified torque:
9 lbf·ft (12 N·m, 1.2 kgf·m)
14. Fill the crankcase with the recommended oil.
Capacity:
0.73 US qt (0.69R)
after draining and oil filter change
0.70 US qt (0.67R)
after draining
15. Install the engine oil fill cap/dipstick.
16. Check the engine oil level by following the
steps in
Checking & Adding Oil (page 50).
Pour the drained oil into a suitable container and
dispose of it in an approved manner (page 144).
Improper disposal of drained fluids is harmful to
the environment.
NOTICE
NOTICE
(6)
(7)
(5)
(4)
(10)
(9)
(8)
8. Remove the oil filter cover bolts (4) and oil
filter cover (5).
9. Remove the oil filter (6) and O-ring (7) from the
oil filter cover.
(4) oil filter cover bolts
(5) oil filter cover
(6) oil filter
(7) oil filter cover O-ring
(8) spring
(9) rubber seal
(10) “OUT-SIDE” mark
Using the wrong oil filter may result in leaks or
engine damage.
NOTICE
7. It is recommended to replace the oil and filter
every 6 races or about every 15.0 hours.
However, if you replace only the oil before
the recommended interval, see page 25.
10. Apply grease to the filter side of the spring
end, then install the spring (8) into a new oil
filter.
11. Position the spring against the engine
crankcase and install a new oil filter with the
rubber seal (9) facing out, away from the
engine. You should see the “OUT-SIDE” mark
(10) on the filter body, near the rubber seal.
Use a new Honda Genuine oil filter or a filter
of equal quality specified for your model.
52 Servicing Your Honda
* Suggested 4-stroke engine oils are equal
performance to SJ oils that are not labeled as
energy conserving and resource conserving on
the circular API service label.
• Your CRF does not need oil additives. Use the
recommended oil.
• Do not use oils with graphite or molybdenum
additives. They may adversely affect clutch
operation.
• Do not use API SH or higher 4-stroke engine
oils displaying the circular API “energy
conserving” and “resource conserving” service
label on the container. They may affect
lubrication and clutch performance.
Transmission Oil
Other viscosities shown in the following chart
may be used when the average temperature in
your riding area is within the indicated range.
API classification
(4-stroke engine oil
only)
Viscosity
(weight)
JASO T903
standard
others
suggested oil*
SAE 10W–30
MA
without friction modifiers as
molybdenum additives
Pro Honda GN4 4-stroke oil
(USA & Canada), or Honda
4-stroke oil or an equivalent
motorcycle oil*
SG or higher except oils
labeled as energy conserving
and resource conserving on
the circular API service label
JASO T 903 standard
The JASO T 903 standard is an index for engine
oils for 4-stroke motorcycle engines.
There are two classes: MA and MB.
Oil conforming to the standard is labeled on the
oil container. For example, the following label
shows the MA classification.
Refer to
Safety Precautions on page 23.
Using the proper oil, and regularly checking,
adding, and changing oil will help extend the
service life of the transmission and clutch. Even
the best oil wears out. Changing oil helps get rid
of dirt and deposits. Operating the engine with
old or dirty oil can damage your engine.
Running the engine with insufficient oil can
cause serious damage to the engine and
transmission.
Oil Recommendation
(2)
(1)
(2)
(1) oil code
(2) oil classification
Servicing Your Honda 53
Transmission Oil
(1)
(2)
(3)
(1)
(2)
(3)
(1) transmission oil fill cap
(2) transmission oil drain bolt
(3) sealing washer
7. Fill the crankcase with recommended oil.
Capacity:
0.72 US qt (0.68R) after draining
8. Install the transmission oil fill cap.
9. Check the transmission oil level by following
the steps in
Checking & Adding Oil (this
page).
Pour the drained oil into a suitable container and
dispose of it in an approved manner (page 144).
Improper disposal of drained fluids is harmful to
the environment.
NOTICE
Checking & Adding Oil
(1) transmission oil fill cap (3) sealing washer
(2) oil check bolt
1. Run the engine at idle for 3 minutes, then shut
it off.
2. Wait 3 minutes after shutting off the engine to
allow the oil to properly distribute itself in the
clutch and transmission.
3. Support the CRF in an upright position on a
level surface.
4. Remove the transmission oil fill cap (1), oil
check bolt (2) and sealing washer (3) from the
right crankcase cover. A small amount of oil
should flow out of the oil check bolt hole.
Allow any excess oil to flow out of the oil
check bolt hole.
If no oil flows out of the oil check bolt hole,
add oil slowly through the transmission oil
filler hole until oil starts to flow out of the oil
check bolt hole.
Install the oil check bolt with a new sealing
washer and transmission oil fill cap. Repeat
step 1– 4.
5. After inspecting the oil level or adding oil,
tighten the oil check bolt to the specified
torque:
Oil Check Bolt:
9 lbf·ft (12 N·m, 1.2 kgf·m).
6. Check that the O-ring (4) is in good condition
and replace it if necessary.
7. Reinstall the transmission oil fill cap (1).
8. Check for oil leaks.
(4)
(1)
(1) transmission oil fill cap
(4) O-ring
Replacing Transmission Oil
1. Run the engine at idle for 3 minutes, then shut
it off.
2. Support the CRF in an upright position on a
level surface.
3. Remove the transmission oil fill cap (1) from
the right crankcase cover.
4. Place an oil drain pan under the engine to
catch the oil. Then remove the transmission
oil drain bolt (2) and sealing washer (3).
5. After the oil has drained, apply fresh engine
oil to the transmission oil drain bolt threads.
6. Install and tighten the transmission oil drain
bolt with a new sealing washer to the
specified torque:
12 lbf·ft (16 N·m, 1.6 kgf·m)
Coolant
54 Servicing Your Honda
(1)
(2)
WARNING
Removing the radiator cap while the
engine is hot can cause the coolant to
spray out, seriously scalding you.
Always let the engine and radiator cool
down before removing the radiator cap.
Your CRF’s liquid cooling system dissipates
engine heat through the coolant jacket that
surrounds the cylinder and cylinder head.
Maintaining the coolant will allow the cooling
system to work properly and prevent freezing,
overheating, and corrosion.
Coolant Recommendation
Use Pro Honda HP coolant or an equivalent high
quality ethylene glycol antifreeze containing
corrosion protection inhibitors specifically
recommended for use in aluminum engines.
Check the antifreeze container label.
Use only distilled water as a part of the coolant
solution. Water that is high in mineral content or
salt may be harmful to the aluminum engine.
Using coolant with silicate inhibitors may cause
premature wear of water seals or blockage of
radiator passages. Using tap water may cause
engine damage.
The factory provides a 50/50 solution of
antifreeze and water in this motorcycle. This
coolant solution is recommended for most
operating temperatures and provides good
corrosion protection.
Decreasing the concentration of antifreeze to less
than 40% will not provide proper corrosion
protection.
NOTICE
Increasing the concentration of antifreeze is not
recommended because it decreases cooling
system performance. Higher concentrations of
antifreeze (up to 60%) should only be used to
provide additional protection against freezing.
Check the cooling system frequently during
freezing weather.
Checking & Adding Coolant
Refer to Safety Precautions on page 23.
1. With the engine cold, remove the radiator cap
(1) and check coolant level. The coolant level
is correct when it is at the bottom of the
radiator filler neck (2).
(1) radiator cap
(2) radiator filler neck
2. Add coolant up to the filler neck if the level is
low.
Inspect the coolant level before each outing.
A coolant loss of 0.7 – 2.0 US oz (20 – 60
cm
3
) through the overflow tube is normal. If
coolant loss is more than this, inspect the
cooling system.
Capacity:
1.16 US qt (1.10R) after disassembly
1.09 US qt (1.03R) after draining
3. Install the radiator cap securely.
If the radiator cap is not installed properly, it
will cause excessive coolant loss and may result
in overheating and engine damage.
NOTICE
Coolant
Servicing Your Honda 55
WARNING
(2)
(1)
(4)
(3)
(3) bleed hole
(4) water pump cover
Removing the radiator cap while the
engine is hot can cause the coolant to
spray out, seriously scalding you.
Always let the engine and radiator cool
down before removing the radiator cap.
Cooling System Inspection
1. Check the cooling system for leaks (see the
Honda Service Manual for troubleshooting of
leaks).
2. Check the water hoses (1) for cracks,
deterioration, and hose clamp for looseness.
3. Check the radiator mount for looseness.
4. Make sure the overflow tube (2) is connected
and not clogged.
5. Check the radiator fins for clogging.
6. Check the bleed hole (3) below the water
pump cover (4) for leakage. Clean away any
clogged dirt or sand, if necessary. Check for
signs of seal leakage. A small amount of
“coolant weeping” from the bleed hole is
normal. If water leaks through the bleed hole,
the mechanical seal is damaged. If oil leaks
through the bleed hole, the oil seal is
damaged. See an official Honda Service
Manual or consult your dealer for replacing
the mechanical seal or oil seal.
Both seals should be replaced at the same
time.
(1) water hoses
(2) overflow tube
Coolant Replacement
Refer to Safety Precautions on page 23.
Coolant should be replaced by your dealer, unless
you have the proper tools and service data and
are mechanically qualified. Refer to the Honda
Service Manual (page 160).
To properly dispose of drained coolant, refer to
You & the Environment, page 144.
Improper disposal of drained fluids is harmful to
the environment.
NOTICE
56 Servicing Your Honda
Air Cleaner
Refer to Safety Precautions on page 23.
The air cleaner uses polyurethane inner and outer
pieces which can’t be separated.
A dirty air cleaner will reduce engine power.
Proper air cleaner maintenance is very important
for off-road vehicles. A dirty, water-soaked,
worn-out, or defective air cleaner will allow dirt,
dust, mud, and other impurities to pass into the
engine.
Service the air cleaner more frequently if you
ride in unusually wet or dusty areas. Your dealer
can help you determine the correct service
interval for your riding conditions.
Your CRF’s air cleaner has very specific
performance requirements. Use a new Honda
Genuine air cleaner specified for your model or
an air cleaner of equal quality.
Using the wrong air cleaner may result in
premature engine wear.
NOTICE
Cleaning
1. Remove the seat (page 33).
2. Remove the air cleaner retaining bolt (1) and
air cleaner assembly (2).
Proper air cleaner maintenance can prevent
premature engine wear or damage, expensive
repairs, low engine power, poor gas mileage, and
spark plug fouling.
Improper or lack of proper air cleaner
maintenance can cause poor performance and
premature engine wear.
NOTICE
(1) air cleaner retaining bolt
(2) air cleaner assembly
(1)
(2)
Servicing Your Honda 57
Air Cleaner
(1) air cleaner retaining bolt
Improper installation of the air cleaner assembly
may allow dirt and dust to enter the engine and
cause rapid wear of the piston rings and
cylinder.
12. Install the seat (page 33)
NOTICE
(2) air cleaner assembly
(8) air cleaner assembly tabs
(9) air cleaner housing stay
(9)
(8)
(2)
10. Carefully position the sealing flange of the
element to prevent dirt intrusion.
3. Remove the air cleaner element (3) from the air
cleaner holder (4) by releasing the holder tab
(5) from the hole (6) of the air cleaner element.
(3) air cleaner element (5) holder tab
(4) air cleaner holder (6) hole
4. Wash the air cleaner in clean non-flammable
cleaning solvent. Then wash in hot, soapy
water, rinse well, and allow to dry thoroughly.
The air cleaner element is made in two pieces:
inner and outer, which cannot be separated.
5. Clean the inside of the air cleaner housing.
6. Allow the air cleaner to dry thoroughly. After
drying, apply 1.7 oz (50 cm
3
) of clean Pro
Honda Foam Filter Oil or an equivalent air
cleaner oil from the inside of the element.
Place the element into a plastic bag (7) and
spread the oil evenly by hand.
(3)
(4)
(6)
(5)
11. Install and tighten the air cleaner retaining
bolt (1) securely.
(1)
(7) plastic bag
7. Assemble the air cleaner element and holder.
Install the holder tab (5) in the hole (6) of the
air cleaner element.
8. Apply 0.1 – 0.2 oz (3 – 5 g) of Pro Honda
White Lithium Grease or equivalent to the air
cleaner housing contact area of the air cleaner
element.
9. Install the air cleaner assembly (2) into the air
cleaner housing by aligning its tabs (8) with
the stay (9) of the air cleaner housing.
(7)
Crankcase Breather
58 Servicing Your Honda
Refer to Safety Precautions on page 23.
Service more frequently if your CRF is ridden in
the rain or often at full throttle.
Service the breather if you can see deposits in the
transparent section of the drain tube.
Draining
1. Remove the crankcase breather tube plug (1)
from the tube (2) and drain deposits into a
suitable container.
2. Reinstall the crankcase breather tube plug.
(1) crankcase breather tube plug
(2) crankcase breather tube
(1)
(2)
Throttle
Servicing Your Honda 59
Refer to Safety Precautions on page 23.
Throttle Freeplay
(1) freeplay
Inspection
Check freeplay (1).
Freeplay:
1/8 – 3/16 in (3 – 5 mm)
If necessary, adjust to the specified range.
Upper
Adjustment
Minor adjustments are generally made with the
upper adjuster.
Lower
Adjustment
The lower adjuster is used for major freeplay
adjustment, such as after replacing the throttle
cables or removing the throttle body. It is also
used if you cannot get the proper adjustment with
the upper adjuster.
(1)
(2)
(4)
(3)
(+)
(–)
(5) lock nut (+) increase
(6) lower adjuster (–) decrease
1. Loosen the lock nut (5).
2. Turn the lower adjuster (6) in direction ( –) to
decrease freeplay, and in direction (+) to
increase freeplay.
3. Tighten the lock nut to the specified torque:
3.0 lbf·ft (4 N·m, 0.4 kgf·m)
4. Operate the throttle grip to ensure that it
functions smoothly and returns completely.
If you can’t get the freeplay within the specified
range, contact your dealer.
(5)
(6)
(+)
(–)
1. Pull the dust cover (2) back.
2. Loosen the lock nut (3).
3. Turn the upper adjuster (4).
Turning the adjuster in direction (–) will
decrease freeplay and turning it in direction
(+) will increase freeplay.
4. Tighten the lock nut to the specified torque:
3.0 lbf·ft (4 N·m, 0.4 kgf·m)
Return the dust cover to its normal position.
5. After adjustment, check for smooth rotation of
the throttle grip from fully closed to fully
open in all steering positions.
If the adjuster is threaded out near its limit or
the correct freeplay cannot be reached, turn
the adjuster all the way in and back out one
turn. Tighten the lock nut, install the dust
cover and make the adjustment with the
lower adjuster.
(2) dust cover (+) increase
(3) lock nut (–) decrease
(4) upper adjuster
60 Servicing Your Honda
Throttle
Throttle Inspection
1. Check that the throttle assembly is positioned
properly (the end of the throttle housing (1) is
aligned with the paint mark (2) on the
handlebar) and the securing bolts are tight.
3. Inspect the condition of the throttle cables
from the throttle grip down to the throttle
body. If the cable is kinked or chafed, have it
replaced.
4. Check the cables for tension or stress in all
steering positions.
5. Lubricate the cables with a commercially
available cable lubricant to prevent premature
rust and corrosion.
(3)
(1) throttle housing (2) paint mark
2. Check for smooth rotation of the throttle (3)
from fully open to fully closed in all steering
positions. If there is a problem, see your
dealer.
(1)
(2)
(3) throttle
Servicing Your Honda 61
Engine Idle Speed
Refer to Safety Precautions on page 23.
Remember, idle speed adjustment is not a “cure-
all” for other problems in your engine ’s PGM-FI
system. Adjusting the idle will not compensate
for a fault elsewhere.
The engine must be at normal operating
temperature for accurate idle speed adjustment.
When pushed in, the fast idle knob acts as the
idle adjust screw.
Turning it counterclockwise results in a
faster/higher idle speed.
Turning it clockwise results in a slower/lower
idle speed.
Idle Speed Adjustment
1. If the engine is cold, start it and warm it up 3
minutes. Then shut it off.
2. Connect a tachometer to the engine.
3. Shift the transmission into neutral. Start the
engine.
4. Keep the motorcycle in an upright position.
5. Adjust idle speed with the fast idle knob (1).
Idle speed:
2,000 ± 100 rpm
(1)
(+)
(–)
(1) fast idle knob
(+) increase
(–) decrease
Clutch System
62 Servicing Your Honda
Refer to Safety Precautions on page 23.
Clutch Lever Adjustment
The distance between the tip of the clutch lever
and grip may be adjusted.
Make sure to adjust the clutch lever freeplay after
the clutch lever position adjustment or clutch
cable disconnected.
(1) lock nut (2) adjuster
1. Loosen the lock nut (1).
2. To position the clutch lever farther away from
the handgrip, turn the adjuster (2)
counterclockwise. To position the brake lever
closer to the handgrip, turn the adjuster
clockwise.
3. Tighten the lock nut.
(3) cable end adjuster
(+) increase freeplay
(–) decrease freeplay
5. Loosen the lock nut (4) and turn the integral
cable adjuster (5) to adjust the clutch lever
freeplay 3/8 – 13/16 in (10 – 20 mm) at the
tip of lever. Tighten the lock nut.
(1)
(2)
(3)
(–)
(+)
4. Turn the cable end adjuster (3) in direction (+)
until it seats lightly and then turn it out 5
turns.
(4)
(5)
(–)
(+)
(4) lock nut
(5) integral cable adjuster
(+) increase freeplay
(–) decrease freeplay
6. Adjust the cable end adjuster for minor
adjustement.
Clutch Lever Freeplay
(1) freeplay
Inspection
Check freeplay (1).
Freeplay:
3/8 – 13/16 in (10 – 20 mm)
If necessary, adjust to the specified range.
Improper freeplay adjustment can cause
premature clutch wear.
Make sure to adjust the clutch lever freeplay after
the clutch cable is disconnected.
(1)
Clutch System
Servicing Your Honda 63
Other Inspections & Lubrication
• Check that the clutch lever assembly is
positioned properly (the end of the holder (1)
aligned with the paint mark (2) on the
handlebar) and the securing bolts are tight.
Integral Cable
Adjustment
The integral cable adjuster is used if the cable
end adjuster is threaded out near its limit — or
the correct freeplay cannot be obtained.
(3) lock nut (+) increase
(4) integral cable adjuster (–) decrease
1. Turn the cable end adjuster in direction ( +)
until it seats lightly and then turn it out 5
turns.
2. Loosen the lock nut (3).
3. Turn the integral cable adjuster (4) to obtain
the specified freeplay.
4. Tighten the lock nut. Check the adjustment.
5. Start the engine, pull the clutch lever in, and
shift into gear. Make sure the engine does not
stall and the motorcycle does not creep.
Gradually release the clutch lever and open
the throttle. Your CRF should move smoothly
and accelerate gradually.
If you can’t get proper adjustment, or the clutch
does not work properly, the cable may be kinked
or worn, or the clutch discs may be worn.
Inspect the clutch discs and plates (page 65).
(3)
(4)
(+)
(–)
Cable End Adjustment
Minor adjustments are generally made with the
clutch cable end adjuster.
(2)
(–)
(+)
(2) cable end adjuster
(+) increase freeplay
(–) decrease freeplay
Turning the cable end adjuster (2) in direction (+)
will increase freeplay and turning it in direction
(–) will decrease freeplay.
If the adjuster is threaded out near its limit or the
correct freeplay cannot be reached, turn the
adjuster all the way in direction (+) and back out
one turn in direction (–) and make the adjustment
with the integral cable adjuster.
(1) holder (2) paint mark
• Check the clutch cable for kinks or signs of
wear. If necessary, have it replaced.
• Lubricate the clutch cable with a
commercially available cable lubricant to
prevent premature wear and corrosion.
Clutch Operation
1. Check for smooth clutch lever operation. If
necessary, lubricate the clutch lever pivot or
clutch cable.
2. Check the clutch cable for deterioration,
kinks, or damage.
(1)(2)
64 Servicing Your Honda
Clutch System
Clutch Cover/Disc/Plate Removal
1. Drain the transmission oil (page 53).
2. Remove the clutch cover bolt A (1), clutch
cover bolts B (2), and clutch cover (3).
(1) clutch cover bolt A (3) clutch cover
(2) clutch cover bolts B
3. Remove the five clutch spring bolts and clutch
springs (4).
Loosen the bolts in a crisscross pattern in two or
three progressive steps.
4. Remove the clutch pressure plate (5).
(4) clutch spring bolts/clutch springs
(5) clutch pressure plate
5. Remove the clutch lifter (6) and clutch lifter
rod (7).
6. Turn the lifter bearing plate of the clutch lifter
bearing with your finger. The bearing plate
should turn smoothly and quietly. Discard the
clutch lifter if the bearing plate does not turn
smoothly.
(3)
(1)
(2)
(5)
(4)
(7)
(6)
(6) clutch lifter
(7) clutch lifter rod
(8) clutch discs, clutch plates, judder spring and spring
seat
(8)
7. Remove the eight clutch discs, seven clutch
plates, judder spring and spring seat (8).
Servicing Your Honda 65
Clutch Disc/Plate Inspection
Replace the clutch discs (1) if they show signs of
scoring or discoloration.
Measure the thickness of each clutch disc.
Service Limit:
0.112 in (2.85 mm)
Replace the clutch discs and clutch plates as an
assembly.
(1)
(1) clutch disc
(2)
(2) clutch plate
If you feel the clutch slippage when replacing the
clutch discs and plates, replace the clutch springs.
Clutch System
Check the clutch plate (2) for excessive warpage
or discoloration. Check the plate warpage on a
surface plate using a feeler gauge.
Measure the thickness of the clutch plates.
Service Limit:
0.004 in (0.10 mm)
Replace the clutch discs and plates as a set.
66 Servicing Your Honda
Clutch System
Clutch Disc/Plate Installation
1. Install the spring seat (1) and judder spring (2)
onto the clutch center as shown.
2. Coat the clutch discs (3) and plates (4) with
engine oil.
3. Install the clutch disc A (larger I.D. disc) (5)
onto the clutch outer.
Stack the seven clutch plates and seven clutch
discs alternately.
4. Apply grease to the clutch lifter rod (6) ends.
5. Insert the clutch lifter rod into the mainshaft.
6. Apply engine oil to the needle bearing of the
clutch lifter.
7. Install the clutch lifter (7) onto the clutch
lifter rod.
(6) clutch lifter rod (7) clutch lifter
8. Install the clutch pressure plate (8).
9. Install the five clutch springs and clutch
spring bolts (9).
(8) clutch pressure plate
(9) clutch spring bolts/clutch springs
(10) O-ring (new) (11) clutch cover
(4)
(1)
(2)
(5)
(3)
(6)
(7)
(8)
(9)
(10)
(11)
11. Apply oil to a new O-ring (10) and install in
the groove of the clutch cover (11).
12. Install the cover by tightening the cover bolts
A, and B in a crisscross pattern in two or
three steps to the specified torque:
7 lbf·ft (10 N·m, 1.0 kgf·m)
(1) spring seat (4) clutch plates
(2) judder spring (5) clutch disc A
(3) clutch discs
10. Tighten the bolts in a crisscross pattern in two
or three steps, to the specified torque:
9 lbf·ft (12 N·m, 1.2 kgf·m)
Servicing Your Honda 67
Refer to Safety Precautions on page 23.
Spark Plug Recommendation
The recommended standard spark plug is
satisfactory for most racing conditions.
Use only the recommended type of spark plugs in
the recommended heat range.
Using a spark plug with an improper heat range
or incorrect reach can cause engine damage.
Using a non-resistor spark plug may cause
ignition problems.
This motorcycle uses a spark plug that has an
iridium tip in the center electrode and a platinum
tip in the side the electrode.
Be sure to observe the following when servicing
the spark plug.
• Do not clean the spark plug. If an electrode is
contaminated with accumulated objects or
dirt, replace the spark plug with a new one.
• To check the spark plug gap, use only a
“wire-type feeler gauge.” To prevent
damaging the iridium tip of the center
electrode and platinum tip of the side
electrode, never use a “leaf-type feeler
gauge.’’
• Do not adjust the spark plug gap. If the gap is
out of specification, replace the spark plug
with a new one.
NOTICE
Spark Plug
Spark Plug Inspection & Replacement
1. Remove the seat and hang the fuel tank to the
left of the frame (pages 33, 34).
2. Disconnect the spark plug cap (1).
3. Clean any dirt from around the spark plug base.
4. Remove the spark plug (2).
7. To obtain accurate spark plug readings,
accelerate up to speed on a straightaway. Push
the engine stop button and disengage the
clutch by pulling the lever in.
Coast to a stop, then remove and inspect the spark
plug. The porcelain insulator around the center
electrode should appear tan or medium gray.
If you're using a new plug, ride for at least 10
minutes before taking a plug reading; a brand-new
plug will not show color initially.
If the electrodes appear burnt, or the insulator is
white or light gray (lean) or the electrodes and
insulator are black or fouled (rich), there is a
problem elsewhere (page 133).
Check the PGM-FI system and ignition timing.
8. With the sealing gasket attached. Thread the
spark plug in by hand to prevent cross-
threading.
9. Tighten the spark plug:
• If the old plug is good:
1/8 turn after it seats.
• If installing a new plug, tighten it twice to
prevent loosening:
a) First, tighten the plug:
NGK: 1/2 turn after it seats.
b) Then loosen the plug.
c) Next, tighten the plug again:
1/8 turn after it seats.
An improperly tightened spark plug can damage
the engine. If a plug is too loose, a piston may
be damaged. If a plug is too tight, the thr eads
may be damaged.
NOTICE
(1) spark plug cap
(2) spark plug
5. Check the electrode for wear or deposits, the
sealing gasket (3) for damage, and the
insulator for cracks. Replace if you detect
them.
6. Check the spark plug gap (4), using a wire-type
feeler gauge. If the gap is out of specifications,
replace the plug with a new one.
The recommended spark plug gap is:
0.024 – 0.028 in (0.6 – 0.7 mm)
(3) sealing gasket
(4) spark plug gap
(1)
(2)
(3)
(4)
Standard R0451B-8 (NGK)
10. Connect the spark plug cap. Take care to
avoid pinching any cables or wires.
11. Install the fuel tank and seat (pages 33, 35).
Refer to Safety Precautions on page 23.
Excessive valve clearance will cause noise and
eventual engine damage. Little or no clearance
will prevent the valve from closing and cause
valve damage and power loss. Check the valve
clearance when the engine is cold at the intervals
specified in the Maintenance Schedule (page 25).
The checking or adjusting of the clearance should
be performed while the engine is cold.
The valve clearance will change as engine
temperature rises.
Valve Clearance
68 Servicing Your Honda
Cylinder Head Cover Removal
Before inspection, clean the engine thoroughly to
keep dirt from entering the engine.
1. Remove the seat and hang the fuel tank to the
left of the frame (pages 33,34).
2. Disconnect the breather tube (1) and spark
plug cap (2).
Positioning At Top Dead Center On The
Compression Stroke
1. Remove the crankshaft hole cap (1).
(1) breather tube (2) spark plug cap
3. Remove the cylinder head cover bolts/rubber
seals (3) and cylinder head cover (4).
(3) cylinder head cover bolts/rubber seals
(4) cylinder head cover
4. Remove the spark plug hole packing.
(1) crankshaft hole cap
2. Remove the spark plug (page 67).
(2)
(1)
(4)
(3)
(1)
Valve Clearance
Servicing Your Honda 69
Valve Clearance Inspection
1. Measure the intake valve clearance by
inserting a feeler gauge (1) between the valve
lifters (2) and intake cams (3).
2. Measure the exhaust valve clearance by
inserting a feeler gauge (1) between the
exhaust rocker arm (4) and exhaust valve
shims (5).
(1) feeler gauge
(4) exhaust rocker arm
(5) exhaust valve shims
Valve Clearances:
IN:
0.005 ± 0.001 in (0.12 ± 0.03 mm)
EX: 0.011 ± 0.001 in (0.28 ± 0.03 mm)
If intake valve clearance and exhaust valve
clearance need adjustment, see
Camshaft
Removal
(page 70) and select the correct shim for
each valve.
(5)
(1) (2)
(3)
(1)
(4)
(5)
(1) feeler gauge
(2) valve lifters
(3) intake cams
3. Rotate the crankshaft by turning the primary
drive gear bolt (2) (crankshaft) clockwise until
aligning the punch mark (3) on the primary
drive gear with the “∆” mark (4) on the right
crankcase cover. In this position, the piston may
either be on the compression or exhaust stroke.
If the crankshaft passed the punch mark,
rotate the primary drive gear bolt clockwise
again and align the punch mark with the “∆”
mark.
The inspection must be made when the piston
is at the top of the compression stroke when
both the intake and exhaust valves are closed.
This condition can be determined by moving
the exhaust rocker arm (5). If it is free, it is an
indication that the valves are closed and that
the piston is on the compression stroke. If it is
tight and the valves are open, rotate the
primary drive gear bolt 360° and realign the
punch mark to the “∆” mark.
(2)
(4)
(3)
(2) primary drive gear bolt (4) “∆” mark
(3) punch mark
(5) exhaust rocker arm
70 Servicing Your Honda
Valve Clearance
Camshaft Removal
1. Record the intake valve clearance and exhaust
valve clearance (page 69).
2. Remove the condenser stay mounting bolts
(1).
(2) cam chain tensioner lifter cover bolt
(3) sealing washer
Use the tensioner stopper tool.
• Tensioner stopper 070MG-0010100
07AMG-001A100
4. Turn the tensioner shaft clockwise with the
tensioner stopper (4) until it stops, in order to
retract the tensioner fully.
Then insert the tensioner stopper fully to hold
the stopper in the fully retracted position.
(4) tensioner stopper
(2)
(3)
(4)
3. Remove the cam chain tensioner lifter cover
bolt (2) and sealing washer (3).
(1) condenser stay mounting bolts
(1)
Servicing Your Honda 71
Valve Clearance
8. Remove the shims (12).
(12) shims
(12)
(12)
(11) valve lifters
(7)
(7)
(6)
(5)
(11)
(5) camshaft holder bolts A
(6) camshaft holder bolts B
(7) camshaft holders
Do not let the set rings fall into the crankcase.
If the set rings are remained on the camshaft
holder, remove the set rings carefully.
NOTICE
(8) left camshaft bearing
(9) camshaft
(10) cam chain
7. Remove the valve lifters (11).
Position the removed intake valve lifters and
shims to indicate their location such as intake or
exhaust, right or left.
Do not let the valve lifters or shims fall into the
crankcase.
NOTICE
(10)
(9)
(8)
6. Slide the left camshaft bearing (8) and remove
the camshaft (9) and cam chain (10), then
attach a piece of wire to the cam chain to
prevent it from falling into the crankcase.
5. Make sure the piston is at TDC on the
compression stroke (page 68).
Remove the camshaft holder bolts A (5), B (6)
and camshaft holders (7).
Loosen the camshaft holder bolts in a
crisscross pattern in two or three steps.
Valve Clearance
72 Servicing Your Honda
Shim Selection
1. Clean the valve shim contact area in the valve
lifter (1) with compressed air.
(1) valve lifter
2. Measure the shim thickness with a micrometer
and record it.
Sixty-nine different thickness shims (2) are
available from the thinnest (1.200 mm
thickness) shim to the thickest (2.900 mm
thickness) in intervals of 0.025 mm.
3. Calculate the new shim thickness using the
equation below.
A = (B – C) + D
A: New shim thickness
B: Recorded valve clearance
C: Specified valve clearance
D: Old shim thickness
• Make sure of the correct shim thickness by
measuring the shim with a micrometer.
• Reface the exhaust valve seat if carbon
deposits result in a calculated dimension of
over 2.900 mm.
Do not lap the intake valves. They are titanium
and have a thin oxide coating. Lapping will
damage this coating.
If a calculated dimension is out of specifications,
have your motorcycle inspected by your dealer.
NOTICE
(1)
(2)
(2) shim
Valve Clearance
Servicing Your Honda 73
(4) primary drive gear bolt (6) “∆” mark
(5) punch mark
4. Apply molybdenum oil solution to the
camshaft journals and cam lobes.
Place the camshaft (7) with the intake cam
lobes (8) facing up and align the timing marks
(9) on the cam sprocket (10) with the surface
of the cylinder head (11).
Install the cam chain (12) over the sprocket
without rotating the camshaft.
(7) cam shaft (12) cam chain
(8) intake cam lobes
(4)
(5)
(6)
(12)
(7)
(8)
Camshaft Installation
1. Install the newly selected shims (1) on the
valve retainers (2).
Do not let the shims fall into the crankcase.
NOTICE
(1) shims (2) v alve retainers
2. Apply molybdenum disulfide oil (a mixture of
1/2 engine oil and 1/2 molybdenum disulfide
grease containing more than 3% molybdenum
disulfide additive) to the outer surface of the
each the valve lifters (3).
Install the valve lifters to the proper position.
3. Rotate the primary drive gear bolt (4)
(crankshaft) clockwise and align the punch
mark (5) with the “
∆” mark (6).
(1)
(1)
(2)
(2)
(3)
(13) set rings
(15) camshaft bearing grooves
(13)
(15)
(13)
(9) timing marks
(10) cam sprocket
(11) surface of the cylinder head
5. Apply grease to the set rings (13) and install it
onto the camshaft bearing grooves (15).
(10)
(11)
(9)
(3) valve lifters
(cont’d)
Valve Clearance
74 Servicing Your Honda
(14) camshaft holders
(17) camshaft holder bolts A
(18) camshaft holder bolts B
10. Install the condenser stay (22) and tighten the
condenser stay mounting bolt (23).
(24) feeler gauge
(14)
(14)
(18)
(17)
(24)
8. Remove the tensioner stopper (19) from the
cam chain tensioner lifter.
(19)
(19) tensioner stopper
9. Install a new sealing washer (20) and tighten
the cam chain tensioner lifter cover bolt (21).
(20) sealing washer
(21) cam chain tensioner lifter cover bolt
(21)
(20)
(16) identification marks
6. Install the camshaft holders (14) in their
proper position by aligning the camshaft
bearing grooves (15) with the set rings (13).
7. Apply oil to the camshaft holder bolt threads
and seating surface.
Tighten the camshaft holder bolts A (17) and
B (18) to the specified torque:
12 lbf·ft (16 N·m, 1.6 kgf·m)
Tighten the camshaft holder bolts in a criss-cross
pattern in two or three steps.
(16)
Each camshaft holder has an identification mark
(16).
(23)
(22)
(22) condenser stay
(23) condenser stay mounting bolts
11. Rotate the camshaft by rotating the crankshaft
clockwise several times.
12. Insert the feeler gauge (24) between the intake
valve lifter and cam.
If the feeler gauge cannot be inserted, the
shim is caught between the valve lifter and
the valve retainer. Remove the camshaft
holders, place the shim correctly, and reinstall
the camshaft holders.
Valve Clearances:
IN: 0.005 ± 0.001 in (0.12 ± 0.03 mm)
EX: 0.011 ± 0.001 in (0.28 ± 0.03 mm)
Valve Clearance
Servicing Your Honda 75
4. Install the cylinder head cover (2) and tighten
the cylinder head cover bolts (6) to the
specified torque:
7 lbf·ft (10 N·m, 1.0 kgf·m)
(2) cylinder head cover
(6) cylinder head cover bolts
5. Connect the spark plug cap (7) and breather
tube (8).
(7) spark plug cap
(8) breather tube
6. Install the fuel tank and the seat (pages 33, 35).
(2)
(6)
(7)
(8)
(4) rubber seal (5) “UP” marks
(4)
(5)
(5)
(25) O-ring (new)
(26) crankshaft hole cap
(26)
(25)
Cylinder Head Cover Installation
1. Check that the spark plug hole packing (1) is
in good condition and replace it if necessary.
Apply engine oil to the spark plug hole
packing and install it to the cylinder head
cover (2).
2. Check that the cylinder head cover packing
(3) is in good condition and replace it if
necessary.
Install the cylinder head cover packing into
the cylinder head cover groove.
13. Install the spark plug (page 67).
14. Coat a new O-ring (25) with oil and install it
onto the crankshaft hole cap (26).
Apply grease to the crankshaft hole cap
threads.
Install and tighten the crankshaft hole cap to
the specified torque:
11 lbf·ft (15 N·m, 1.5 kgf·m)
(1) spark plug hole packing
(2) cylinder head cover
(3) cylinder head cover packing
3. Check the rubber seals (4) are in good
condition, replace them if necessary.
Install the rubber seals onto the cylinder head
cover with the “UP” marks (5) facing up.
(2)(3)
(1)
76 Servicing Your Honda
Piston/Piston Rings/Piston Pin
Cylinder Head Removal
1. Clean the area above the engine before
disassembly to prevent dirt falling into the
engine.
2. Drain the radiator coolant after cooling the
motorcycle (page 143).
3. Remove the seat and hang the fuel tank (pages
33, 34).
4. Remove the muffler (page 100) and subframe
(page 36).
5. Remove the exhaust pipe (page 102).
6. Remove the spark plug (page 67).
7. Remove the cylinder head cover (page 68).
8. Set the piston at TDC on the compression
stroke (page 68).
9. Remove the camshaft holder, camshaft, valve
lifters and shims (page 70).
(1) ECT sensor connector
11. Loosen the radiator hose clamp screw (2) and
disconnect the radiator hose (3).
(2) radiator hose clamp screw
(3) radiator hose
(3)
(2)
10. Disconnect the ECT sensor connector (1).
(1)
(4) shock absorber upper nut
(5) bolt
13. Remove the condenser stay mounting bolts (6).
Loosen the insulator band screw (7) and pull
the throttle body (8) out from the insulator (9).
Do not hang the throttle body and support it with
a suitable strap.
(6) condenser stay bolts (8) throttle body
(7) insulator band screw (9) insulator
(9) (8)
(7)
(6)
12. Remove the shock absorber upper nut (4) and
bolt (5).
(4)
(5)
Servicing Your Honda 77
Piston/Piston Rings/Piston Pin
14. Remove the cylinder head hanger bolts (10).
Remove the cylinder head hanger plate bolts
(11), left cylinder head hanger plate (12) and
right cylinder head hanger plate (13).
(10) cylinder head hanger bolts
(11) cylinder head hanger plate bolts
(12) left cylinder head hanger plate
(13) right cylinder head hanger plate
(10)
(13)
(11)
(10)
(12)
(11)
15. Remove the cylinder head bolts (14).
16. Loosen the cylinder bolt (15).
(14) cylinder head bolts
(15) cylinder bolt
(16) cylinder head stud bolts/washers
(17) cylinder head
(14)
(15)
(17)
(16)
17. Remove the cylinder head stud bolts/washers
(16) and cylinder head (17).
Loosen the nuts in a crisscross pattern in two
or three steps.
Do not let the nuts, washers, valve lifters, shims,
and cam chain fall into the crankcase.
NOTICE
(cont’d)
78 Servicing Your Honda
Piston/Piston Rings/Piston Pin
18. Remove the dowel pins (18), cylinder head
gasket (19) and cam chain guide (20).
Do not let the dowel pins and cam chain fall into
the crankcase.
NOTICE
(18) dowel pins (20) cam chain guide
(19) cylinder head gasket
(20)
(19)
(18)
Piston/Piston Rings/Piston Pin
Servicing Your Honda 79
Cylinder Removal
1. Remove the cylinder bolt (1) and cylinder (2).
Do not let the cam chain fall into the crankcase.
Do not pry on or strike the cylinder.
NOTICE
(1) cylinder bolt
(2) cylinder
2. Remove the dowel pins (3) and cylinder
gasket (4).
Do not let the dowel pins fall into the crankcase.
NOTICE
(3) dowel pins
(4) cylinder gasket
Piston Removal
1. Place clean shop towels in the crankcase to
keep the piston pin clips or other parts from
falling into the crankcase.
2. Remove the piston pin clips (1) using a pair of
needle-nose pliers.
3. Press the piston pin (2) out of the piston (3),
and remove the piston.
Under racing conditions, the piston and rings
should be replaced every 6 races or about every
15.0 hours of running. Replace the piston pin every
6 races or about every 15.0 hours of running.
Piston Ring Removal
Spread each piston ring (1) and remove by lifting
it up at a point just opposite the gap.
Do not damage the piston ring by spreading the
ends too far.
NOTICE
(1)
(2)
(4)
(3)
(3)
(2)
(1)
(1) piston pin clip (3) piston
(2) piston pin
(1)
(1) piston ring
Piston/Piston Rings/Piston Pin
80 Servicing Your Honda
Piston Ring Installation
1. Clean the piston ring thoroughly.
2. Apply engine oil to the piston rings and install
them.
Do not damage the piston ring by spreading the
ends too far.
Do not damage the piston during piston ring
installation.
• To install the oil ring, install the spacer first,
then install the side rails.
• Install the top ring on the piston with the
marking side facing up.
3. After installing the rings they should rotate
freely, without sticking.
Space the ring end gaps 180 degrees apart
between the top ring and the upper side rail.
Space the ring end gaps 90 degrees apart
between the upper side rail, spacer, and the
lower side rail.
NOTICE
top ring
oil ring
mark
top ring
oil
ring
side rail
side rail
spacer
Piston/Piston Pin/Piston Ring
Inspection
We recommend you consult the Service Manual
or your dealer for correct Service Limit
measurements.
Piston/Piston Rings/Piston Pin
Servicing Your Honda 81
Piston Installation
1. Place clean shop towels over the crankcase
opening to keep the piston pin clips from
falling into the crankcase.
2. Apply molybdenum disulfide oil (a mixture of
1/2 engine oil and 1/2 molybdenum disulfide
grease containing more than 3% molybdenum
disulfide additive) to the inner surface of the
connecting rod small end.
3. Install the piston (1) with the “
O” mark (2)
and/or the large valve recess (3) facing the
intake side of the engine.
4. Apply engine oil to the piston pin (4) and
inner surface of the piston pin hole.
Install the piston pin and new piston pin clips
(5).
Use new piston pin clips. Never reuse old piston
pin clips.
Do not let the piston pin clips fall into the
crankcase.
Do not align the piston pin clip end gap with the
piston cut-out (6).
NOTICE
(1) piston (4) piston pin
(2) “
O” mark (5) piston pin clip
(3) large valve recess (6) piston cut-out
Cylinder Installation
1. Place clean shop towels over the crankcase
opening to prevent dust or dirt from entering
the engine.
2. Clean off any gasket material from the gasket
surface of the crankcase.
3. Remove the shop towel. Do not let any gasket
debris fall into the crankcase.
4. Install the dowel pins (1) and a new cylinder
gasket (2).
Do not let the dowel pins fall into the crankcase.
NOTICE
(1) dowel pins
(2) cylinder gasket
5. Clean any gasket material off the cylinder.
(1)
(3)
(2)
(1)
(4)
(5)
(2)
(6)
(5)
(2)
(1)
(cont’d)
Piston/Piston Rings/Piston Pin
82 Servicing Your Honda
6. Apply clean engine oil to the cylinder wall,
piston outer surface and piston rings.
Route the cam chain (3) through the cylinder
(4).
Install the cylinder over the piston rings by
hand while compressing the piston rings (5).
Do not damage the piston rings and cylinder
walls.
NOTICE
(3) cam chain (5) piston rings
(4) cylinder
7. Install the cam chain guide (6) and fit the cam
chain guide tabs (7) in the cylinder cut-outs
(8).
Push the guide until it bottoms in the
crankcase guide hole.
(6) cam chain guide
(7) cam chain guide tabs
(8) cylinder cut-outs
Cylinder Head Installation
1. Install the dowel pins (1) and a new cylinder
head gasket (2).
Do not let the dowel pins fall into the crankcase.
NOTICE
(1) dowel pins
(2) cylinder head gasket
(7)
(6)
(8)
(2)
(1)
(3)
(5)
(4)
Piston/Piston Rings/Piston Pin
Servicing Your Honda 83
2. Route the cam chain through the cylinder
head (3).
Install the cylinder head.
Do not damage mating surfaces when installing
the cylinder head.
3. Apply engine oil to the cylinder head stud bolt
threads.
Install the washers and cylinder head stud
bolts (4).
Tighten the cylinder head stud bolts in a
crisscross pattern in two or three steps to the
specified torque:
33 lbf·ft (45 N·m, 4.6 kgf·m)
Do not let the washers and bolts fall into the
crankcase.
NOTICE
NOTICE
4. Install the cylinder bolt (5) and cylinder head
bolts (6) and tighten them to the specified
torque:
7 lbf·ft (10 N·m, 1.0 kgf·m)
(3) cylinder head
(4) cylinder head stud bolts/washers
(5) cylinder bolt
(6) cylinder head bolts
(3)
(4)
(6)
(5)
(7) left cylinder head hanger plate
(8) right cylinder head hanger plate
(9) cylinder head hanger plate bolts
(10) cylinder head hanger bolts
(10)
(7)
(9)
5. Install the left cylinder head hanger plate (7)
and right cylinder head hanger plate (8), then
loosely install the cylinder head hanger plate
bolts (9) and cylinder head hanger bolts (10).
Tighten the cylinder head hanger bolts and
cylinder head hanger plate bolts to the
specified torque:
cylinder head hanger bolts:
40 lbf·ft (54 N·m, 5.5 kgf·m)
cylinder head hanger plate bolts:
24 lbf·ft (33 N·m, 3.4 kgf·m)
(10)
(8)
(9)
(cont’d)
(11) throttle body (13) insulator band screw
(12) insulator
7. Set the rear shock absorber (14) and install the
rear shock absorber upper bolt (15) and nut
(16).
Tighten the rear shock absorber upper nut to
the specified torque:
32 lbf·ft (44 N·m, 4.5 kgf·m)
84 Servicing Your Honda
Piston/Piston Rings/Piston Pin
(17) radiator hose
(18) water hose joint
9. Tighten the radiator hose clamp screw (19) as
illustrated below.
(19) radiator hose clamp screw
(19)
0 – 0.04 in
(0 – 1.0 mm)
(16)
(15)
(14)
(14) rear shock absorber (16) nut
(15) rear shock absorber upper bolt
8. Connect the radiator hose (17) to the water
hose joint (18) of the cylinder head.
(17)
(18)
10. Connect the ECT sensor connector (20).
(20) ECT sensor connector
11. Install the shims, valve lifters, camshaft and
camshaft holder (page 73).
12. Install the crankshaft hole cap (page 75).
13. Install the cylinder head cover (page 75).
14. Install the spark plug (page 67).
15. Install the exhaust pipe (page 102).
16. Install the subframe (page 37) and muffler
(page 101).
17. Install the fuel tank and seat (pages 33, 35).
18. Fill and bleed the cooling system (page 143).
Check for the following:
– compression leaks
– abnormal engine noise
– secondary air leaks
– coolant leaks
– oil leaks
(20)
6. Install the throttle body (11) to the insulator
(12) by aligning the tab of the throttle body
with the groove of the insulator and tighten
the insulator band screw (13) so the distance
between the band ends is 0.43 ± 0.04 in (11.0 ±
1.0 mm).
(12)
(11)
(13)
0.43 ± 0.04 in
(11.0 ± 1.0 mm)
Align
Servicing Your Honda 85
Suspension
Refer to Safety Precautions on page 23.
Loose, worn, or damaged suspension components
may adversely affect the handling and stability of
your CRF. If any suspension components appear
worn or damaged, see your dealer for further
inspection. Your dealer is qualified to determine
whether or not replacement parts or repairs are
needed.
Front Suspension Inspection
• When your CRF is new, break it in for
approximately 1 hour to ensure that the
suspension has worked in (page 19).
• After break-in, test run your CRF with the
front suspension at the standard setting before
attempting any adjustments.
• For optimum fork performance, we
recommend that you disassemble and clean
the fork after riding your CRF for 3 hours.
See page 112 for fork disassembly.
• Replace the fork oil every 3 races or 7.5 hours
of running. See page 87 for oil capacity
adjustment after changing the fork oil.
• Replace the damper fork oil every 9 races or
22.5 hours of running. See page 115 for
damper fork oil level adjustment after
changing the fork oil.
• Use HP Fork Oil, SS-19 or an equivalent
which contains special additives to assure
maximum performance of your CRF's front
suspension.
• Periodically check and clean all front
suspension parts to assure top performance.
Check the dust seals for dust, dirt, and foreign
materials. Check the oil for any
contamination.
• Refer to
Suspension Adjustment Guidelines
(page 130). Make all rebound and
compression damping adjustments in one-click
increments. (Adjusting two or more clicks at
a time may cause you to pass over the best
adjustment.) Test ride after each adjustment.
• If you become confused about adjustment
settings, return to the standard position and
start over.
• If the fork is still too stiff/soft after adjusting
compression damping, determine which
portion of the travel is still too stif f/soft. This
is an important step that will help you solve
suspension problems.
1. Make sure that the fork protectors (1) and dust
seals (2) are clean and not packed with mud
and dirt.
2. Check for signs of oil leakage. Damaged or
leaking fork seals should be replaced before
your CRF is ridden.
(1) fork protector (2) dust seal
3. Inspect the wear rings (3) for wear or damage.
Replace the wear ring if it is 0.06 in (1.5 mm)
or flat with the outer tube (4).
When replacing the wear ring, remove the
fork leg (page 112).
Install the wear ring with its end gap (5)
facing rearward.
(3) wear ring (4) outer tube
(3) wear rings (5) end gaps
4. Make a quick check of fork operation by
locking the front brake and pushing down on
the handlebar several times.
(2)
(1)
(3)
(4)
(3)
(5)
(3)
86 Servicing Your Honda
Suspension
86 Servicing Your Honda
Rear Suspension Inspection
The swingarm is controlled by one hydraulic
shock absorber with an aluminum reservoir for
oil and nitrogen gas pressure. The gas pressure
in the reservoir is contained within a rubber
bladder.
The shock absorber’s spring pre-load and
damping adjustments (compression and rebound)
should be adjusted for the rider ’s weight and
track conditions (page 129).
Do not attempt to disassemble, service, or
dis
pose of the damper; see your dealer. The
instructions found in this owner’s manual are
limited to adjustments of the shock assembly only.
• When your CRF is new, break it in for
approximately one hour with the standard
suspension settings before attempting to
adjust the rear suspension.
• Make all compression and rebound damping
adjustments in the specified increment or
turns described in page 126. Test ride after
each adjustment.
• If the rear suspension is too stiff/soft, adjust it
by turning all the compression and rebound
adjusters according to the procedures
described in page 126. After adjusting the
adjusters simultaneously, suspension may be
fine-tuned by turning one of the compression
and rebound damping adjusters in one click or
in 1/12 turn increments.
(Adjusting two or more increments or turns at
a time may cause you to pass over the best
adjustment.)
• If you have a problem finding an acceptable
adjustment, return to the standard position and
begin again.
1. Bounce the rear of the motorcycle up and down
and check for smooth suspension action.
2. Remove the subframe (page 36).
3. Check for a broken or collapsed spring.
4. Check the rear shock absorber (1) for a bent
shaft or oil leaks.
(1) rear shock absorber
5. Push the rear wheel sideways to check for
worn or loose swingarm bearings. There
should be no movement. If there is, have the
bearings replaced by your dealer.
(1)
Servicing Your Honda 87Servicing Your Honda 87
Suspension
Recommended Fork Oil
Fork Oil Change
Refer to Front Suspension Disassembly on page
112.
1. Record the rebound damping adjuster position
and turn the adjuster counterclockwise until it
stops.
2. Hold the outer tube (1), then remove the fork
damper (2) from the outer tube using a lock
nut wrench (3). Gently slide the outer tube
down onto the axle holder (4).
• Lock nut wrench 07WMA-KZ30100
suggested oil HP Fork Oil,
SS-19
(1) outer tube (3) lock nut wrench
(2) fork damper (4) axle holder
The outer tube (1) can drop on the slider (5) and
damage the fork dust seal (6). To avoid damage,
hold both the outer tube and slider when
removing the fork damper.
NOTICE
(1) outer tube (6) dust seal
(5) slider
3. Drain the fork oil from the outer tube (1).
Drain the fork oil from the oil hole (7) of the
fork damper.
(1) outer tube (7) oil hole
4. Drain the fork oil by turning the outer tube (1)
upside down. (About 0.4 US oz (12 cm
3
) of
fork oil will be left in the outer tube when it is
left inverted for about 20 minutes at 20
°C/68°F.)
(1) outer tube
Pour the drained oil into a suitable container and
dispose of it in an approved manner (page 144).
Improper disposal of drained oil is harmful to the
environment.
NOTICE
Amount of fork oil left in the fork
(within damper and spring) unit: cm
3
minute
°C/°F
30/86
20/68
10/50
0/32
5
16.5
17.4
18.9
20
10
14.1
15
16.5
18.4
20
12.7
13.7
14.8
15.9
35
11.8
12.6
13.7
14.5
55
11
11.5
12.5
13.7
85
10.1
10.5
11.4
13
145
8.6
9.1
9.8
11.7
(1)
(2)
(3)
(1)
(4)
(6)
(5)
(1)
NO GOOD
(1)
(7)
(1)
0°C/32°F
10°C/50°F
20°C/68°F
30°C/86°F
(cont’d)
88 Servicing Your Honda
Suspension
5. Pour the recommended fork oil into the outer
tube (1).
No mark
Fork Oil Capacity:
Standard 26.20 lbf/in (4.59 N/mm) Fork Spring
Standard oil
capacity
12.3 US oz
(363 cm
3
)
Maximum oil
capacity
13.0 US oz
(384 cm
3
)
Slightly stiffer as
it nears full
compression.
Slightly softer as
it nears full
compression.
Minimum oil
capacity
10.1 US oz
(300 cm
3
)
Optional Softer 25.12 lbf/in (4.4 N/mm) Fork Spring
Standard oil
capacity
12.2 US oz
(360 cm
3
)
Maximum oil
capacity
12.9 US oz
(381 cm
3
)
Slightly stiffer as
it nears full
compression.
Slightly softer as
it nears full
compression.
Minimum oil
capacity
10.1 US oz
(298 cm
3
)
2 scribe marks
Optional Stiffer 27.41 lbf/in (4.8 N/mm) Fork Spring
Standard oil
capacity
12.0 US oz
(356 cm
3
)
Maximum oil
capacity
12.8 US oz
(377 cm
3
)
Slightly stiffer as
it nears full
compression.
Slightly softer as
it nears full
compression.
Minimum oil
capacity
9.9 US oz
(294 cm
3
)
3 scribe marks
(1)
Be sure the oil capacity is the same in both fork
legs.
(1) outer tube
Servicing Your Honda 89
Suspension
6. Check that the O-ring (8) on the fork damper
(2) is in good condition. Apply the
recommended fork oil to the O-ring.
(1) outer tube (8) O-ring
(2) fork damper
7. Temporarily install the fork damper to the
outer tube (1).
After installing the fork leg (page 112) tighten
the fork damper to the specified torque:
Actual:
25 lbf·ft (34 N·m, 3.5 kgf·m)
Torque wrench scale reading:
23 lbf·ft (31 N·m, 3.2 kgf·m), using a 20 in
(500 mm) long torque wrench.
When using the lock nut wrench, use a 20 in
(500 mm) long deflecting beam type torque
wrench. The lock nut wrench increases the
torque wrench’s leverage, so the torque wrench
reading will be less than the torque actually
applied to the fork damper.
(8)
(1)
(2)
90 Servicing Your Honda
Brakes
Refer to Safety Precautions on page 23.
Both the front and rear brakes are the hydraulic
disc type. As the brake pads wear, the brake
fluid level will drop. A leak in the system will
also cause the level to drop.
Frequently inspect the system to ensure there are
no fluid leaks. Periodically inspect the brake
fluid level and the brake pads for wear.
If the braking response of the front brake
lever or rear pedal feels unusual, check the
brake pads. if the brake pads are not worn
beyond the recommended limit (page 93),
there is probably air in the brake system.
Refer to an official Honda Service Manual
or see your dealer to have the air
bled from the system.
(1) lock nut
(2) adjuster
1. Loosen the lock nut (1).
2. To position the brake lever farther away from
the handgrip, turn the adjuster (2) clockwise.
To position the brake lever closer to the
handgrip, turn the adjuster counterclockwise.
3. While holding the adjuster, tighten the lock
nut to the specified torque:
4.4 lbf·ft (5.9 N·m, 0.6 kgf·m)
4. Apply silicone grease to the contacting faces
of the adjuster.
Rear Brake Pedal Height
The brake pedal height should be approximately
level with the right footpeg.
1. Loosen the lock nut (1) and turn the adjusting
bolt (2) in direction (+) to raise the rear brake
pedal (3) or in direction (–) to lower it.
2. Tighten the lock nut to the specified torque at
the desired pedal height.
4.4 lbf·ft (5.9 N·m, 0.6 kgf·m)
(1) lock nut (+) raise the pedal height
(2) adjusting bolt (–) lower the pedal height
(3) rear brake pedal
(1)
(2)
(3)
(1)
(2)
(+)
(–)
Front Brake Lever Adjustment
Servicing Your Honda 91
Brakes
Fluid Level Inspection
Front Brake Fluid Level Check
(1) LWR mark
With the motorcycle in an upright position, check
the fluid level.
It should be above the LWR mark (1). If the level
is at or below the LWR mark, check the brake
pads for wear (page 93).
Worn brake pads should be replaced. If the pads
are not worn, have your brake system inspected
for leaks.
If the pulling distance for the front brake lever
feels excessive , there is probably air in the brake
system and it must be bled.
Refer to an official Honda Service Manual or see
your dealer for brake bleeding.
Honda recommends using Honda DOT 4
brake fluid from a scaled container, or an
equivalent.
Other Checks:
Make sure there are no fluid leaks.
Check for deterioration or cracks in the
hoses and fittings.
Rear Brake Fluid Level Check
(2) LOWER level mark
With the motorcycle in an upright position, check
the fluid level.
It should be above the LOWER level mark (2). If
the level is at or below the LOWER level mark,
check the brake pads for wear (page 93).
Worn brake pads should be replaced. If the pads
are not worn, have your brake system inspected
for leaks.
If the travel for the rear brake pedal feels
excessive , there is probably air in the brake
system and it must be bled. Refer to an
official Honda Service Manual or see your dealer
for brake bleeding.
Honda recommends using Honda DOT 4
brake fluid from a sealed container, or an
equivalent.
Other Checks:
Make sure there are no fluid leaks.
Check for deterioration or cracks in the
hoses and fittings.
(1)
(2)
92 Servicing Your Honda
Brakes
Adding Front Brake Fluid
Spilled brake fluid will severely damage the
painted surfaces. It is also harmful to some
rubber parts. Be careful whenever you remove
the reservoir cap; make sure the reservoir is
horizontal first.
• Always use fresh DOT4 brake fluid from a
sealed container when servicing the system.
Do not mix different types of fluid as they
may not be compatible.
• The recommended brake fluid is Pro Honda
DOT 4 brake fluid or an equivalent.
NOTICE
(1) screws
(2) reservoir cap
(3) diaphragm
(4) upper level mark
1. Remove the screws (1), reservoir cap (2) and
diaphragm (3).
2. Fill the reservoir with DOT 4 brake fluid to
the upper level mark (4). Do not overfill.
3. Reinstall the diaphragm and reservoir cap.
4. Tighten the screws to the specified torque:
0.7 lbf·ft (1.0 N·m, 0.1 kgf·m)
Adding Rear Brake Fluid
Spilled brake fluid will severely damage the
painted surfaces. It is also harmful to some
rubber parts. Be careful whenever you remove
the reservoir cap; make sure the reservoir is
horizontal first.
• Always use fresh DOT4 brake fluid from a
sealed container when servicing the system.
Do not mix different types of fluid as they
may not be compatible.
• The recommended brake fluid is Pro Honda
DOT 4 brake fluid or an equivalent.
NOTICE
(5) bolts (8) diaphragm
(6) reservoir cap (9) upper level mark
(7) set plate
1. Remove the bolts (5) reservoir cap (6), set
plate (7) and diaphragm (8).
2. Fill the reservoir with DOT 4 brake fluid to
the upper level mark (9). Do not overfill.
3. Set the diaphragm as shown.
4. Reinstall the set plate and reservoir cap.
5. Tighten the bolts to the specified torque:
0.7 lbf·ft (1.0 N·m, 0.1 kgf·m)
(3)
(2)
(4)
(1)
(5)
(6)
(8)
(7)
(9)
Servicing Your Honda 93
Brakes
Brake Pad Wear
Brake pad wear depends on the severity of usage
and track conditions. (Generally, the pads will
wear faster on wet and dirty tracks) Inspect the
pads at each regular maintenance interval
(page 25).
Front Brake Pads
Inspect the brake pads (2) through the front
wheel to determine the pad wear. If either pad is
worn anywhere to a thickness of 0.04 in (1.0 mm),
both pads must be replaced.
(1) front brake caliper (3) brake disc
(2) brake pads
Rear Brake Pads
Inspect the brake pads (5) from the rear side of
the caliper to determine the pad wear. If either
pad is worn anywhere to a thickness of 0.04 in
(1.0 mm), both pads must be replaced.
(4) rear brake caliper (6) brake disc
(5) brake pads
Other Inspections
Check that the brake lever and pedal assemblies
are positioned properly and the securing bolts are
tight.
Make sure there are no fluid leaks. Check for
deterioration or cracks in the hoses and fittings.
minimum thickness
indicator
wear indicator
grooves
replace
replace
0.04 in
(1.0 mm)
0.04 in
(1.0 mm)
(1)
(3)
(2)
(2)
replace
0.04 in
(1.0 mm)
minimum thickness
indicator
(5)
(5)
(4)
(6)
94 Servicing Your Honda
Wheels
Refer to Safety Precautions on page 23.
Keeping the wheels true (round) and maintaining
correct spoke tension is critical to safe
motorcycle operation. During the first few rides,
spokes will loosen more rapidly due to the initial
seating of the parts. Excessively loose spokes
may result in instability at high speeds and the
possible loss of control. It’s also important that
the rim locks are secure to prevent tire slippage.
It is not necessary to remove the wheels to
perform the recommended service in the
Maintenance Schedule (page 25). However,
information for wheel removal is provided for
emergency situations.
Wheel Rims & Spokes
(1) wheel rim (3) rim lock
(2) spoke
1. Inspect the wheel rims (1) and spokes (2) for
damage.
2. Tighten, any loose spokes and rim locks (3) to
the specified torque:
Front Spoke
:
2.7 lbf·ft (3.7 N·m, 0.4 kgf·m)
Rear Spoke :
2.7 lbf·ft (3.7 N·m, 0.4 kgf·m)
Rim Lock : 9 lbf·ft (12 N·m, 1.2 kgf·m)
3. Check wheel rim runout. If runout is
noticeable, see the Honda Service Manual for
inspection instructions.
Axles & Wheel Bearings
See the Honda Service Manual for inspection
information:
1. Check the axle shaft for runout.
2. Check the condition of the wheel bearings.
(1)
(3)
(2)
Servicing Your Honda 95
Tires & Tubes
WARNING
Using tires that are excessively worn or
improperly inflated can cause a crash in
which you can be seriously hurt or killed.
Follow all instructions in this owner’s
manual regarding tire inflation and
maintenance.
Front 15 psi (100 kPa, 1.0 kgf/cm
2
)
Rear 15 psi (100 kPa, 1.0 kgf/cm
2
)
Refer to Safety Precautions on page 23.
To safely operate your CRF the tires must be the
proper type (off-road) and size, in good condition
with adequate tread, and correctly inflated.
The following pages give detailed information on
how and when to check your air pressure, how to
inspect your tires for wear and damage, and our
recommendations on tire repair and replacement.
Air Pressure
Properly inflated tires provide the best
combination of handling, tread life, and riding
comfort. Generally, underinflated tires wear
unevenly, adversely affect handling, and are more
likely to fail from being overheated.
Underinflated tires can also cause wheel damage
on hard terrain. Overinflated tires make your
CRF ride harshly, are more prone to damage
from surface hazards, and wear unevenly.
Make sure the valve stem caps are secure. If
necessary, install new caps.
Always check air pressure when your tires are
“cold.” If you check air pressure when your tires
are “warm” — even if your CRF has only been
ridden for a few miles — the readings will be
higher. If you let air out of warm tires to match
the recommended cold pressures, the tires will be
underinflated.
The correct “cold” tire pressures are:
If you decide to adjust tire pressures for a
particular riding condition, make changes a little
at a time.
Inspection
Take time to inspect your tires and wheels before
you ride.
• Inspect carefully for bumps or bulges in the
side of the tire or the tread. Replace any tire
that has a bump or bulge.
• Look closely for cuts, slits, or cracks in the
tires. Replace a tire if you can see fabric or
cord.
• Check for rocks or other objects embedded in
the tire or tread. Remove any objects.
• Check the position of both valve stems. A
tilted valve stem indicates the tube is slipping
inside the tire or the tire is slipping on the
rim.
Tube Replacement
If a tube is punctured or damaged, you should
replace it as soon as possible. A repaired tube
may not have the same reliability as a new one,
and it may fail while you are riding.
Use a replacement tube equivalent to the original.
96 Servicing Your Honda
WARNING
Tires & Tubes
Tire Replacement
The tires that came on your CRF were designed
to provide a good combination of handling,
braking, durability, and comfort across a broad
range of riding conditions.
• When replacing, use the original equipment
tires or equivalent tires of the same size,
construction, speed rating, and load range as
the originals.
• Replace the tube any time you replace a tire.
The old tube will probably be stretched and, if
installed in a new tire, could fail.
Front
Rear
Type
80/100 – 21 51M
DUNLOP
100/90 – 19 57M
DUNLOP
MX51FA
MX51
bias-ply, tube
Installing improper tires on your
motorcycle can affect handling and
stability. This can cause a crash in which
you can be seriously hurt or killed.
Always use the size and type of tires
recommended in this owner’s manual.
Servicing Your Honda 97
Drive Chain
Refer to Safety Precautions on page 23.
The service life of the chain depends on proper
lubrication and adjustment. Poor maintenance
can cause premature wear or damage to the drive
chain or sprockets.
When the motorcycle is ridden on unusually
dusty or muddy tracks, more frequent
maintenance will be necessary.
Before servicing your drive chain, turn the
engine OFF and check that your transmission is
in neutral.
Inspection
1. Turn the engine off, raise the rear wheel off
the ground by placing an optional workstand
or equivalent support under the engine and
shift the transmission into neutral.
2. Check the drive chain slack (1) in the upper
drive chain run midway between the drive (2)
and driven sprockets (3). Drive chain slack
should allow the following vertical movement
by hand:
1 – 1 3/8 in (25 – 35 mm)
(1) drive chain slack (3) driven sprocket
(2) drive sprocket
3. Check drive chain slack at several points
along the chain. The slack should remain
constant. If it isn’t, some links may be kinked
and binding. Lubricating the chain will often
eliminate binding and kinking.
Excessive chain slack may allow the drive chain
to damage the engine cases.
4. Inspect the drive chain for:
• damaged rollers
• loose pins
• dry or rusted links
• kinked or binding links
• excessive wear
Replace the drive chain (page 99) if it has
damaged rollers, loose pins, or kinks that cannot
be free. Lubricate the drive chain (page 98) if it
appears dry or shows signs of rust. Lubricate
any kinked or binding links and work them free.
Adjust chain slack if needed (page 98).
NOTICE
(1) chain slider
2. Check the chain guide slider (2) for wear.
Replace the guide slider if it is worn to the
bottom of the wear indicator (3).
(2) chain guide slider (3) wear indicator
(2)
(3)
(1)
(1)
0.2 in
(5 mm)
0.10 in
(2.5 mm)
(2)
(3)
Drive Chain Sliders
1. Check the chain slider (1) for wear.
Replace it if below the service limit.
SERVICE LIMIT:
upper side: 0.2 in (5 mm)
lower side: 0.10 in (2.5 mm)
98 Servicing Your Honda
Drive Chain
(1) rear axle nut (4) index mark
(2) lock nut (5) axle plate
(3) adjusting bolt (6) reference mark
3. Tighten the rear axle nut to the specified
torque:
94 lbf·ft (128 N·m, 13.1 kgf·m)
4. Recheck chain slack and adjust as necessary.
5. Loosen the adjusting bolt counterclockwise
lightly until it touches the axle plate. Then,
while holding the adjusting bolt with a
wrench, tighten the lock nut to the specified
torque:
20 lbf·ft (27 N·m, 2.8 kgf·m)
(4)
(5)
(3)
(2)
(1)
(6)
Lubrication
Commercially prepared drive chain lubricants
may be purchased at most motorcycle shops and
should be used in preference to motor oil. Pro
Honda HP Chain Lube or an equivalent is
recommended.
Saturate each chain joint so that the lubricant
penetrates the space between adjacent surfaces of
the link plates and rollers.
Adjustment
1. Loosen the rear axle nut (1).
2. Loosen both lock nuts (2) and turn the
adjusting bolts (3) counterclockwise to
decrease slack or clockwise to increase slack.
Align the index marks (4) of the axle plates
(5) with the same reference marks (6) on both
sides of the swingarm.
Drive Chain Rollers
1. Check the upper drive chain roller (1) and
lower drive chain roller (2) for wear or
damage.
2. Measure the diameter of the drive chain
rollers and replace them if below the service
limit.
Service Limit:
Upper roller:
1.5 in (39 mm)
Lower roller: 1.2 in (31 mm)
Replace the roller if necessary as follows.
Install the upper drive chain roller (Green) with
the “
/” mark (3) facing toward the frame and
lower drive chain roller (Black) as shown.
Tighten the drive chain roller bolt and nut to the
specified torque:
Upper roller bolt:
9 lbf·ft (12 N·m, 1.2 kgf·m)
Lower roller nut: 9 lbf·ft (12 N·m, 1.2 kgf·m)
(1) upper drive chain roller (3) “
//
” mark
(2) lower drive chain roller
(3)
(1)
(2)
Servicing Your Honda 99
Drive Chain
4. Inspect the sprocket teeth for wear or damage.
We recommend replacing the sprocket
whenever a new chain is installed.
Both chain and sprockets must be in good
condition, or the new replacement chain or
sprocket(s) will wear rapidly.
Excessively worn sprocket teeth have a
hooked, worn appearance. Replace any
sprocket which is damaged or excessively
worn.
Use of a new chain with worn sprockets will
cause rapid chain wear.
5. Measure a section of the drive chain to
determine whether the chain is worn beyond
its service limit. Put the transmission in gear ,
and then turn the rear wheel forward until the
lower section of the chain is pulled taut. With
the chain held taut and any kinked joints
straightened, measure the distance between a
span of 17 pins, from pin center to pin center .
If the measurement exceeds the service limit,
replace the chain. After the chain is
measured, shift the transmission into neutral
again before proceeding with inspection and
service.
NOTICE
MEASURE A SPAN OF 17 PINS (16 PITCHES)
6. Lubricate the drive chain.
7. Pass the chain over the sprockets and join the
ends of the chain with the master link. For
ease of assembly, hold the chain ends against
adjacent rear sprocket teeth while inserting
the master link. Install the master link
retaining clip so that the closed end of the clip
will face the direction of forward wheel
rotation.
8. Recheck chain slack and adjust as necessary.
More About Drive Chain
• The master link is the most critical element of
drive chain security. Master links are
reusable, as long as they remain in excellent
condition. We recommend installing a new
master link retaining clip when the drive
chain is reassembled.
• You may find it easier to install a new chain
by connecting it to the old chain with a
master link and pulling the old chain to
position the new chain on the sprockets.
Removal, Cleaning & Replacement
For maximum service life, the drive chain should
be cleaned, lubricated, and adjusted before each
outing.
1. Remove the master link retaining clip (1) with
pliers. Do not bend or twist the clip.
Remove the master link (2). Remove the
drive chain.
(1) retaining clip (2) master link
2. Clean the drive chain in high flash-point
solvent and allow it to dry.
3. Inspect the drive chain for possible wear or
damage. Replace the drive chain if it has
damaged rollers, loose fitting links, or
otherwise appears unserviceable.
Replacement chain:
Size/link:
DID520DMA4-116RB
RK520TXZ-116RJ
(1)
(2)
Service limit: 10.20 in (259.0 mm)
100 Servicing Your Honda
Exhaust Pipe/Muffler
Exhaust Pipe/Muffler Inspection
Check the mounting bolts and exhaust pipe joint
nuts for tightness.
Check the exhaust pipe and muffler for cracks or
deformation.
A damaged exhaust pipe and muffler may reduce
engine performance.
(1) seat mounting bolt (3) right side cover
(2) side cover bolt
2. Loosen the muffler clamp bolt (4).
(5) muffler mounting A bolt (8) washer B
(6) muffler mounting B bolt (9) muffler
(7) washer A
(2)
(1)
(3)
(5)
(6)
(7)
(8)
(9)
Muffler Removal
1. Remove the seat mounting bolt (1), side cover
bolt (2) and right side cover (3).
(4) muffler clamp bolt
3. Remove the muffler mounting A bolt (5),
muffler mounting B bolt (6), washer A (7),
washer B (8) and muffler (9).
(4)
Servicing Your Honda 101
Exhaust Pipe/Muffler
Muffler Installation
1. Remove the old gasket from exhaust pipe (1).
2. Install the muffler clamp (2) and a new gasket
(3) to the exhaust pipe.
(1) exhaust pipe (3) gasket (new)
(2) muffler clamp
3. Install the muffler (4).
4. Install the muffler clamp (2) by aligning the
tab (5) of the muffler clamp with the cutout
(6) of the muffler.
(2) muffler clamp (5) tab
(4) muffler (6) cutout
5. Install the washer A (7) washer B (8), muffler
mounting B bolt (9) and muffler mounting A
bolt (10).
(7) washer (A)
(8) washer (B)
(9) muffler mounting B bolt
(10) muffler mounting A bolt
6. Tighten the muffler clamp bolt (11) to the
specified torque:
15 lbf·ft (21 N·m, 2.1 kgf·m)
(9) muffler mounting B bolt
(10) muffler mounting A bolt
(3)
(2)
(1)
(6)
(4)
(5)
(2)
(10)
(9)
(7)
(8)
(10)
(9)
7. Tighten the muffler mounting B bolt (9) and
muffler mounting A bolt (10) to the specified
torque:
19 lbf·ft (26 N·m, 2.7 kgf·m)
(11) muffler clamp bolt
(11)
(cont’d)
102 Servicing Your Honda
Exhaust Pipe/Muffler
8. Install the right side cover (12) and bolt (13).
9. Install the seat mounting bolt (14) and tighten
it to the specified torque:
19 lbf·ft (26 N·m, 2.7 kgf·m)
Tighten the bolt (12) to the specified torque:
7 lbf·ft (10 N·m, 1.0 kgf·m)
(13)
(14)
(12)
(12) right side cover (14) seat mounting bolt
(13) bolt
Exhaust Pipe Removal
1. Remove the muffler (page 100).
2. Remove the exhaust pipe joint nuts (1),
exhaust pipe (2) and gasket (3).
(1) exhaust pipe joint nuts
(2) exhaust pipe
(3) gasket
Exhaust Pipe Installation
1. Install a new exhaust pipe gasket (1) as
shown.
2. Install the exhaust pipe (2) and exhaust pipe
joint nuts (3).
(1) exhaust pipe gasket (new)
(2) exhaust pipe
(3) exhaust pipe joint nuts
3. Install the muffler (page 101) but do not
tighten the bolts yet.
4. Tighten the exhaust pipe joint nuts to the
specified torque:
15 lbf·ft (21 N·m, 2.1 kgf·m)
5. Tighten the muffler clamp bolt, muffler
mounting A bolt and B bolt (page 101).
6. Install the removed parts in the reverse order
of removal.
(2)
(3)
(1)
(2)
(3)
(1)
Servicing Your Honda 103
Steering Damper
(1)
(3)
(2)
(4)
(5)
(6)
Refer to Safety Precaution on page 23.
Loose, worn or damaged steering damper
components may adversely affect the handling
and stability of your CRF. If any steering damper
components appear worn or damaged, see your
dealer for further inspection. Your dealer is
qualified to determine whether or not
replacement parts are needed.
Do not attempt to disassemble the steering
damper; see your dealer.
The instructions found in this owner ’s manual are
limited to adjustment and service of the steering
damper assembly only.
Steering Damper Operation Inspection
• When your CRF is new, break it in for
approximately 1 hour to ensure that the
steering damper is broken in (page 19).
• After break-in, test run your CRF with the
steering damper at the standard setting before
making any adjustments.
• Check the spherical bearings and dust seal for
dust, dirt, and foreign materials.
• Make all damping adjustments in one-click
increments. (Adjusting two or more clicks at a
time may cause you to pass over the best
adjustment.) Test ride after each adjustment.
• If you have a problem finding an acceptable
adjustment, return to the standard position and
begin again.
1. Unlock the number plate tab (1) from the
handlebar pad.
Remove the bolts (2) and number plate (3).
(4) steering damper
(5) damper rod
(6) steering damper mounting bolts
3. With your CRF on a box or an optional
workstand (front wheel elevated), check that
the steering moves smoothly from side-to-
side.
4. Install the number plate (3) by aligning its
holes (7) with the tabs (8) on the steering
stem.
Install and tighten the bolts (2) securely.
Route the number plate tab (1) around the
handlebar pad (9) as shown.
(1)
(3)
(7)
(2)
(9)
(8)
(1) number plate tab (7) holes
(2) bolts (8) tabs
(3) number plate (9) handlebar pad
(1) number plate tab (3) number plate
(2) bolts
2. Check the steering damper (4) for deformation
or oil leaks.
Check the damper rod (5) for bending or damage.
Replace the damper case or damper rod if
there is any abnormarity.
Refer to the Honda Service Manual or see
your Honda dealer for steering damper
disassembly.
Check the torque of the steering damper
mounting bolts (6):
15 lbf·ft (20 N·m, 2.0 kgf·m).
104 Servicing Your Honda
(2) spherical bearings
Installation
1. Clean and apply a locking agent to the
steering damper mounting bolt threads.
2. Install the steering damper (1) with its “UP”
mark (2) facing up and forward. Turn the
damper rod and its stopper ring (3) facing
toward the front side.
3. Install the collar (4) and steering damper
mounting bolts (5).
Be sure to install the collar with its wide
flange side facing toward the steering head
pipe side.
4. Tighten the steering damper mounting bolts to
the specified torque:
15 lbf·ft (20 N·m, 2.0 kgf·m)
(1) steering damper
(2) “UP” mark
(3) stopper ring
(4) collar
(5) steering damper mounting bolts
5. Place your CRF on the workstand or
equivalent support with the front wheel off the
ground.
Check that the steering moves smoothly from
side-to-side.
Steering Damper
(3)
(2)
(1)
(1)
(2)
(3)
(4)
(5)
(2)
(1)
Removal
1. Remove the number plate (page 103).
2. Remove the steering damper mounting bolts
(1), collar (2) and steering damper (3).
(1) steering damper mounting bolts
(2) collar
(3) steering damper
Inspection
1. Check the damper rod (1) operation.
The damper rod is fully extended and
compressed by hand. Release the damper rod,
then check that it extends to its maximum length.
If the damper rod does not extend its
maximum length, disassemble and inspect for
steering damper.
Refer to the Honda Service Manual or see
your dealer.
2. Check the condition of the spherical bearings
(2).
Move the spherical bearing with your finger.
The spherical bearing should move smoothly
and quietly.
Replace the spherical bearing if it does not
move smoothly and quietly.
Refer to the Honda Service Manual or see
your dealer.
6. Install the number plate (page 103).
(1) damper rod
Servicing Your Honda 105Servicing Your Honda 105
Additional Maintenance Procedures
Refer to Safety Precautions on page 23.
Steering Head Bearings Inspection
1. With your CRF on a box or workstand (front
wheel elevated), turn the handlebar to the
right and left to check for roughness in the
steering head bearings.
Handlebar Inspection
1. Remove the handlebar pad.
2. Check the handlebar (1) for bends or cracks.
3. Check that the handlebar has not moved from
its proper position. Make sure the end of the
handlebar holders (2) is aligned with the paint
mark (3) on right or left side.
4. Check the torque of the handlebar upper
holder bolts (4):
16 lbf·ft (22 N·m, 2.2 kgf·m)
Tighten the front bolts first.
(1) handlebar
(2) handlebar holders
(3) paint mark
(4) handlebar upper holder bolts
Control Cables
Periodically, disconnect the throttle, clutch and
hot start cables at their upper ends. Thoroughly
lubricate the cable pivot points with a
commercially-available cable lubricant. If the
clutch lever, hot start lever and throttle operation
is not smooth, replace the cable.
Be sure the throttle returns freely and
automatically from fully open to fully closed in
all steering positions.
(3)
(1)
(2)
(4) (4)
2. Stand in front of your CRF, grab the fork (at
the axle), look at the steering head, and push
the fork in and out (toward the engine) to
check for play in the steering head bearings.
If any roughness or play is felt, but you do
not see any movement in the steering head,
the fork bushings may be worn. Refer to the
Honda Service Manual for replacement or
adjustment procedures, or see your dealer.
106 Servicing Your Honda106 Servicing Your Honda
Additional Maintenance Procedures
Nuts, Bolts, Fasteners
Check and tighten nuts, bolts, and fasteners
before every outing.
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
ENGINE
Cylinder head cover bolts
Exhaust pipe joint nuts
Water pump cover bolts
Crankshaft hole cap
Transmission oil check
bolt
Clutch cover bolts
Coolant drain bolt
Engine oil drain bolt
Cylinder bolt
Oil filter cover bolts
Cylinder head bolts
Drive sprocket bolt
Transmission oil drain bolt
Cylinder head stud bolts
Torque
lbf
•
ft N
•
m kgf
•
m
7
15
7
11
9
7
7
12
7
9
7
23
12
33
10
21
10
15
12
10
10
16
10
12
10
31
16
45
1.0
2.1
1.0
1.5
1.2
1.0
1.0
1.6
1.0
1.2
1.0
3.2
1.6
4.6
(1) cylinder head cover bolts
(2) exhaust pipe joint nuts
(3) water pump cover bolts
(4) crankshaft hole cap
(5) transmission oil check bolt
(6) clutch cover bolts
(7) coolant drain bolt
(8) engine oil drain bolt
(9) cylinder bolt
(10) oil filter cover bolts
(11) cylinder head bolts
(12) drive sprocket bolt
(13) transmission oil drain bolt
(14) cylinder head stud bolts
(1)
(4)
(8)
(5)
(6)
(14)
(7)
(2)
(3)
(9)
(10)
(12)
(1)
(13)
(14)
(11)
RIGHT SIDE
LEFT SIDE
Servicing Your Honda 107Servicing Your Honda 107
Appearance Care
Refer to Safety Precautions on page 23.
Frequent cleaning and polishing will keep your
Honda looking newer longer. Frequent cleaning
also identifies you as an owner who values his
motorcycle. A clean CRF is also easier to inspect
and service.
While you’re cleaning, be sure to look for
damage, wear, and gasoline or oil leaks.
General Recommendations
• To clean your CRF you may use:
– water
– a mild, neutral detergent and water
– a mild spray and wipe cleaner/polisher
– a mild spray and rinse cleaner/degreaser and
water
• Avoid products that contain harsh detergents
or chemical solvents that could damage the
metal, paint, and plastic on your CRF or
discolor the seat and decals.
• If your CRF is still warm from recent
operation, give the engine and exhaust system
time to cool off.
• We recommend the use of a garden hose to
wash your CRF. High pressure washers, (like
those at coin-operated car washes) can
damage certain parts of your CRF. The force
of water under extreme pressure can penetrate
the dust seals of the suspension pivot points
and steering head bearings-driving dirt inside
and needed lubrication out.
If you use a high pressure washer, avoid spraying
the following areas:
wheel hubs
muffler outlet
under seat
engine stop button
brake master cylinders
under fuel tank
drive chain
throttle body
steering head bearings
suspension pivot points
(1) steering head bearings
(2) suspension pivot points
High pressure water (or air) can damage
certain parts of your CRF.
You may use Pro Honda Hondabrite, a
multi-surface cleaner/degreaser, to remove both
dirt and petroleum-based grime from paint, alloy,
plastic, and rubber surfaces. Wet any heavy
deposits with water first. Then spray on the Pro
Honda Hondabrite and rinse with a garden hose
at full pressure. Stubborn deposits may require a
quick wipe with a sponge.
NOTICE
Washing Your Motorcycle with a Mild
Detergent
1. Rinse your CRF thoroughly with cool water to
remove loose dirt.
2. Fill a bucket with cool water. Mix in a mild,
neutral detergent, such as dish washing
liquid or a product made especially for
washing motorcycles or automobiles.
3. Wash your CRF with a sponge or a
soft towel. As you wash, check for heavy
grime. If necessary, use a mild
cleaner/degreaser to remove the grime.
Do not use steel wool to clean the frame as it
could damage or discolor the frame surface.
Muffler stain remover (Scotch Brite Hand Pad
#7447-maroon) is for removing stains on the
non-coated aluminum frame only.
4. After washing, rinse your CRF thoroughly
with plenty of clean water to remove any
residue.
5. Dry your CRF with a chamois or a soft towel.
6. Lubricate the drive chain to prevent rusting.
7. Start the engine and let it idle for several
minutes. The engine heat will help dry moist
areas.
8. As a precaution, ride at a slow speed and
apply the brakes several times. This will help
dry the brakes and restore normal braking
performance.
NOTICE
(2)
(1)
108 Servicing Your Honda108 Servicing Your Honda
Appearance Care
Condensation Control
Some condensation can form within the
transmission cavity as well. This is natural and
just one more reason you should change the
engine and transmission oil often.
After Cleaning Lubrication
There are some things you should do just after
washing your CRF to help prevent rust and
corrosion.
Once your CRF is clean and dry, you should
protect any bare steel from rusting by applying a
light coating of a rust-inhibitor. Lubricate the
drive chain and drive sprocket after removing
and thoroughly cleaning in solvent. Be sure the
chain is wiped clean and is dry before applying
the chain lube.
Follow the suggestions given in the pages of this
manual for lubricating items such as the brake
and clutch lever pivot points and footpeg pivot
pins.
Aluminum Frame Maintenance
Aluminum corrodes when it comes in contact
with dust, mud and road salt.
To remove stains, use Scotch Brite Hand Pad
#7447 (maroon) or an equivalent.
Wet the pad and polish the surface using strokes
parallel to the length of the frame.
Clean the frame using a wet sponge and a mild
detergent, then rinse well with clean water. Dry
the frame with a soft clean cloth, using strokes
parallel to the length of the frame.
Do not use steel wool to clean the frame as it
could damage or discolor the frame surface.
Muffler stain remover (Scotch Brite Hand Pad
#7447-maroon) is for removing stains on the
non-coated aluminum frame only.
NOTICE
Exhaust Pipe Maintenance
The exhaust pipe is stainless steel, but may
became stained by oil or mud.
To remove mud or dust, use a wet sponge and a
liquid kitchen abrasive, then rinse well with clean
water. Dry with a chamois or a soft towel.
If necessary, remove heat stains by using a
commercially available fine texture compound.
Then rinse by the same manner as removing mud
or dust.
This section tells you how to fine tune your CRF
for maximum competition performance.
Initial suspension adjustments should be
performed after a minimum of two hours of easy
break-in time.
Optional front and rear suspension springs are
available in both stiffer and softer than standard
rates, in order to tailor your CRF specifically for
your weight, riding style and course conditions.
Follow the instructions given in the rear
suspension sag setting section of
Rear
Suspension Adjustments
to determine if your
combined rider and sprung machine weight (rider
fully dressed for competition and machine
coolant, oil and fuel levels ready for competition)
requires an optional stiffer or softer rear spring.
The need for either optional rear spring may need
to be balanced by installing the optional fork
springs of a similar rate.
Front Suspension Adjustments .........................110
Rear Suspension Adjustments..........................125
Suspension Adjustments for Track
Conditions...................................................129
Suspension Adjustment Guidelines..................130
Tuning Tips ......................................................133
Steering Damper Adjustment ...........................134
Steering Damper Adjustment Guidelines.........135
Chassis Adjustments.........................................136
Gearing .............................................................137
Tire Selection for Track Conditions.................138
Personal Fit Adjustments .................................139
Adjustments for Competition 109
Adjustments for Competition
(1)
(2)
110 Adjustments for Competition
Front Suspension Adjustments
The front suspension can be adjusted for the
rider’s weight and riding conditions by using one
or more of the following methods:
•
Oil volume — The effects of higher or lower
fork oil capacity are only felt during the final
3.9 in (100 mm) of fork travel.
•
Compression damping — Turning the
compression damping adjuster (1) adjusts how
quickly the fork compresses.
•
Rebound damping — Turning the rebound
damping adjuster (2) adjusts how quickly the
fork extends.
•
Fork springs — Optional springs are
available in softer and stiffer types than the
standard rate. (page 156)
The inverted fork on your CRF features sealed
damper cartridges with dual (separate air and oil)
chambers to prevent aeration. The design also
isolates the oil in each fork tube/slider, which
may contain air bubbles and/or metal particles,
from the sealed cartridge to provide more
consistent damping.
(1) compression damping adjuster
(2) rebound damping adjuster
(2)
(1)
Front Suspension Air Pressure
Air is an unstable gas which builds up pressure
as it is worked (such as in a fork). Air pressure
acts as a progressive spring and affects the entire
range of fork travel. This means the fork action
on your CRF will get stiffer during a race. For
this reason, release built-up air pressure in the
fork legs between motos. Be sure the fork is
fully extended with the front tire off the ground
when you release the pressure.
The standard air pressure is 0 psi (0 kPa, 0
kgf/cm
2
). You may relieve accumulated air
pressure in the fork legs by using the pressure
release screws. The front wheel should be off the
ground before you release the pressure. The air
pressure should be adjusted according to the
altitude and outside temperature.
1. Place a workstand under the engine, so that
the front wheel is off the ground.
Do not adjust air pressure with the front wheel
on the ground as this will give false pressure
readings.
2. Remove the pressure release screw (1).
3. Check that the O-rings (2) is in good condition.
4. Install and tighten the pressure release screw
to the specified torque:
1.0 lbf·ft (1.3 N·m, 0.1 kgf·m)
(1) pressure release screw (2) O-rings
Front Suspension Damping
Compression Damping
Adjustment
This adjustment affects how quickly the fork
compresses. The fork compression damping
adjuster has 16 positions or more. Turning the
compression damping adjuster screw (1) one full
turn changes the adjuster 4 positions. To adjust
the adjuster to the standard position, proceed as
follows:
Turn the adjuster clockwise until it will no longer
turn (lightly seats). This is the full hard position.
The adjuster is set in the standard position when
the adjuster is turned counterclockwise 7 clicks.
Make sure that both fork legs are adjusted to the
same position.
Rebound Damping
Adjustment
The fork rebound damping adjuster has 16
positions or more. Turning the rebound damping
adjuster screw (2) one full turn clockwise
advances the adjuster 4 positions. To adjust the
rebound damping to the standard setting, proceed
as follows:
Turn the adjuster clockwise until it will no longer
turn (lightly seats). This is the full hard position.
The adjuster is set in the standard position when
the adjuster is turned counterclockwise 11 clicks.
Make sure that both fork legs are adjusted to the
same position.
Adjustments for Competition 111
Front Suspension Adjustments
Both compression and rebound damping can be
increased by turning the adjuster clockwise.
Always start with full hard when adjusting
damping.
Do not turn the adjuster screw more than the
given positions or the adjuster may be damaged.
Be sure that the compression and rebound
adjusters are firmly located in a detent, and not
between positions.
NOTICE
Fork Springs
The fork springs in CRF’s are about right for
riders weighing between 170 lb (77 kg) and 200
lb (91 kg) (less riding gear). So if you're a
heavier rider, you have to go up on the oil
capacity or get a stiffer spring. Do not use less oil
than the minimum specified for each spring or
there will be a loss of rebound damping control
near full extension. If the fork is too hard on big
bumps, turn the damping adjuster
counterclockwise 1-click and lower the oil
capacity in increments of 0.2 US oz (5 cm
3
) in
both fork legs until the desired performance is
obtained. Do not, however, lower the oil capacity
below the minimum oil capacity.
Minimum oil capacity:
Standard spring:
10.1 US oz (300 cm
3
)
Softer spring: 10.1 US oz (298 cm
3
)
Stiffer spring: 9.9 US oz (294 cm
3
)
When adjusting oil capacity, bear in mind that
the air in the fork will increase in pressure while
riding; therefore, the higher the oil capacity, the
higher the eventual pressure of any air in the
fork.
(1) compression (2) rebound damping
damping adjuster screw
adjuster screw
(1)
(2)
Oil capacity 13.0 US oz (384 cm
3
)
(MAX)
Oil capacity 12.3 US oz (363 cm
3
)
(STANDARD)
Oil capacity 10.1 US oz (300 cm
3
)
(MIN)
112 Adjustments for Competition
Front Suspension Disassembly
• If your CRF is brand-new, put enough part-
throttle break-in time (about 1 hour) on it to
ensure that the suspension has worked in.
• For optimum performance, and extended fork
life, the fork should be completely
disassembled and cleaned after the first 3
hours of riding. See an official Honda
Service Manual or your dealer for this service.
• When disassembling the fork, turn the
compression (1) and rebound (2) damping
adjusters counterclockwise to the softest
position to prevent damaging the adjustment
needle (be sure to record the number of turns
from the starting position).
(1) compression damping (2) rebound damping
adjuster adjuster
(1)
(2)
Front Suspension Adjustments
(4)
(3)
4. Loosen the fork bridge upper pinch bolts (5).
5. Loosen the fork damper (6) using a lock nut
wrench (7), but do not remove them yet.
• Lock nut wrench 07WMA-KZ30100
Do not use an adjustable wrench to loosen the
fork damper: it may damage them.
NOTICE
(5) fork bridge upper pinch bolts
(6) fork damper
(7) lock nut wrench
6. Remove the disc cover (8) by removing disc
cover socket bolts (9).
(8) disc cover
(9) disc cover socket bolts
(5)
(6)
(7)
(8)
(9)
1. Remove the number plate (page 103).
2. Place your CRF on an optional workstand or
equivalent support with the front wheel off the
ground.
3. Remove the handlebar lower holder nuts,
washers, mounting rubbers (3) and handlebar
(4).
Keep the master cylinder upright to prevent air
from entering system.
NOTICE
(3) handlebar lower holder nuts, washers and
mounting rubbers
(4) handlebar
Adjustments for Competition 113
Front Suspension Adjustments
(10) front axle nut (12) front axle shaft
(11) axle pinch bolts
8. Remove the brake hose clamp bolts (13), stay A
(14) and stay B (15).
9. Remove the brake caliper mounting bolts (16)
and brake caliper (17).
• Do not support the brake caliper by the brake
hose.
• Do not operate the brake lever after the front
wheel is removed. To do so will cause
difficulty in fitting the brake disc between the
brake pads.
(13) brake hose clamp bolts
(14) stay A
(15) stay B
(16) brake caliper mounting bolts
(17) brake caliper
10. Remove the fork protector socket bolts (18)
and fork protectors (19).
(12)
(11)
(11)
(10)
(17)
(15)
(14)
(13)
(16)
7. Remove the front axle nut (10) and loosen the
axle pinch bolts (11) on both forks.
Pull the front axle shaft (12) out of the wheel
hub and remove the front wheel.
(18) fork protector socket bolts
(19) fork protectors
(19)
(19)
(18)
(18)
(23)
(22)
(21)
(20) fork bridge lower pinch bolts
12. Clean the fork assembly, especially the sliding
surface (21) of the slider and fork dust seal
(22).
13. Measure the length (23) between the axle
holder and outer tube and record it before
disassembling the fork.
(20)
11. Loosen the fork bridge lower pinch bolts (20),
then pull the fork legs down and out.
(21) sliding surface (23) length
(22) fork dust seal
(cont’d)
114 Adjustments for Competition
Front Suspension Adjustments
(27) outer tube/slider (28) oil holes
16. Place the lower end (axle holder) (24) of the
slider in a vise with a piece of wood or soft
jaws to avoid to damage.
Over-tightening the vise can damage the axle
holder.
17. Remove the fork center bolt (29).
NOTICE
(24) axle holder (29) fork center bolt
(24)
(7)
(6)
(27)
(28)
(24)
(29)
(22) fork dust seal (26) slider
(25) outer tube
(22)
(25)(26)
NO GOOD
(6) fork damper (24) axle holder
(7) lock nut wrench
The outer tube (25) can drop on the slider (26)
and damage the fork dust seal (22).
To avoid damage, hold both the outer tube and
slider when removing the fork damper.
NOTICE
14. Hold the outer tube, then remove the fork
damper (6) from the outer tube using a lock
nut wrench (7). Gently slide the outer tube
down onto the lower end (axle holder) (24).
15. Drain the fork oil from the outer tube/slider
(27) and oil holes (28) of the fork damper .
20. Hold the fork center bolt lock nut and remove
the fork center bolt from the fork damper.
Do not remove the lock nut from the fork damper
piston rod. If the lock nut is removed, the piston
rod will fall in the fork damper and you may not
reassemble the fork damper.
NOTICE
18. Push the fork center bolt (29) out from the
axle holder (24) of the slider by pushing the
fork damper. While the fork center bolt is
pushed out, install the piston base (30) or a
mechanic’s stopper tool between the axle
holder and fork center bolt lock nut (31).
• Piston base 07958-2500001
19. Make the mechanic's stopper tool out of a thin
piece of steel (0.08 in (2.0 mm) thick) as
shown if you do not have a special tool.
1.5 in (39 mm)
0.6 in
(15 mm)
2.2 in (55 mm)
0.30 in
(7.5 mm)
1.0 in
(25 mm)
Adjustments for Competition 115
Front Suspension Adjustments
(cont’d)
(24) axle holder (30) piston base
(29) fork center bolt (31) fork center bolt lock nut
21. Remove the push rod (32) from the fork damper .
22. Remove the piston base (30) or mechanic's
stopper tool between the axle holder (24) and
fork center bolt lock nut (31) while pushing
the fork damper.
Be careful not to damage the lock nut and fork
center bolt hole.
NOTICE
(29)
(31)
(30)
(24)
23. Remove the fork damper assembly (33) from
the fork assembly (34).
Remove the fork from the vise.
Remove the fork spring (35), spring retainer
(36) and collar/washer (37) from the fork
assembly. Remove the O-ring (38).
Do not attempt to separate the fork assembly and
drop the axle holder out from the outer tube,
which can damage the guide bushings (39).
To avoid damage, hold both the outer tube and
silder.
NOTICE
Damper Oil Change
1. Place the fork damper (1) in a vise with a
piece of wood or soft jaws to avoid damage.
Over-tighten the vise can damage the fork
damper.
2. Loosen the fork cap assembly (2) while
holding the fork damper (1) using the lock nut
wrench (3).
• Lock nut wrench 07WMA-KZ30100
NOTICE
(1) fork damper (3) lock nut wrench
(2) fork cap assembly
(32)
(31)
(30)
(24)
(36)
(37)
(34)
(35)
(38)
(33)
(1)
(3)
(2)
(33) fork damper assembly (36) spring retainer
(34) fork assembly (37) collar/washer
(35) fork spring (38) O-ring
(24) axle holder (31) fork center bolt lock nut
(30) piston base (32) push rod
(39)
NO GOOD
(39) guide bushings
116 Adjustments for Competition
Front Suspension Adjustments
(2) fork cap assembly (4) fork damper piston rod
5. Empty the fork oil from the fork damper
oil/spring chamber (5) by pumping the
damper rod several times.
6. Clean the fork cap and fork damper threads
(6).
8. Pump the fork damper piston rod (4) slowly
several times to bleed the air from the fork
damper (1).
(1) fork damper (4) fork damper piston rod
9. Apply fork oil to the fork cap bushings (7),
new O-rings (8) and piston ring (9) on the
fork cap assembly (2).
(2)
(4)
(5)
(1)
(1)
(4)
(6) fork cap and fork damper threads
7. Extend the fork damper piston rod to maximum
length.
Pour the recommended fork oil into the fork
damper (1).
Recommended Oil:
HP Fork Oil, SS-19
Recommended Amount:
8.4 US oz (248 cm
3
)
3. Remove the fork cap assembly (2) from the
fork damper threads and then pop it out by
pumping the fork damper piston rod (4)
slowly.
4. Remove the fork cap assembly (2).
Be careful not to damage the fork cap bushings.
Do not disassemble the fork cap assembly.
Replace the fork cap as an assembly if it is
damaged.
(5) fork damper oil/spring chamber
(6)
(1) fork damper
(8)
(2)
(7)
(9)
(2) fork cap assembly (8) O-rings
(7) fork cap bushings (9) piston ring
Adjustments for Competition 117
Front Suspension Adjustments
(cont’d)
10. Extend the fork damper piston rod (4) to
maximum length, holding it, install the fork
cap assembly (2) to the fork damper (1) with
vertical position.
Be careful not to damage the fork cap piston ring.
If it is difficult to install the fork cap assembly,
the fork damper oil level might be higher than
standard oil level.
(2)
(1)
(4)
(1) fork damper (4) fork damper piston rod
(2) fork cap assembly
(5) fork damper oil chamber (11) shop towel
13. Check the fork damper piston rod sliding
surface for damage.
14. Cover the fork damper piston rod end with
shop towel (11) to prevent fork damage.
Cover the oil holes with shop towel (11) to
prevent blow out of fork oil.
Blow the extra oil off from the fork damper
oil chamber (5) by pumping the fork damper
piston rod to full stroke.
Be careful not to bend or damage the fork
damper piston rod when the piston rod is stroked.
NOTICE
(4)
(10)
(5)
(11)
(11)
(1) fork damper (3) lock nut wrench
(2) fork cap assembly
12. Completely screw in the fork center bolt lock
nut (10) to the fork damper piston rod (4).
(1)
(3)
(2)
11. Place the fork damper (1) in a vise with a
piece of wood or soft jaws to avoid damage.
Tighten the fork cap assembly (2) while
holding the cutout of the fork damper using
the lock nut wrench (3) to the specified
torque:
22 Ibf·ft (30 N·m, 3.1 kgf·m)
• Lock nut wrench 07WMA-KZ30100
Over-tightening the vise can damage the fork
damper.
NOTICE
(4) fork damper piston rod (10) fork center bolt lock nut
118 Adjustments for Competition
Front Suspension Adjustments
Fork Assembly
1. Drain the fork oil from the fork assembly (1)
by placing it upside down.
(About 0.2 US oz (5.4 cm
3
) cc of fork oil will
be left in the outer tube/slider when it is left
inverted for about 20 minutes at 20 °C/68°F)
(1) fork assembly
To properly dispose of drained fluids, refer to
You & the Environment (page 144).
2. Tighten the fork center bolt lock nut (2) fully
and measure the thread length (A) as shown.
Standard:
0.43 – 0.51 in (11 – 13 mm)
Wipe the oil completely off the fork damper.
(2) fork center bolt lock nut (A) thread length
(1)
(A)
(2)
(5) fork damper oil chamber (12) oil holes
Pour the drained oil into a suitable container and
dispose of it in an approved manner (page 144).
Improper disposal of drained fluids is harmful to
the environment.
NOTICE
(5)
(12)
15. Drain the extra oil from the oil holes (12) of
the fork damper oil chamber (5).
By doing this procedure, about 0.2 US oz (5 cm
3
)
of fork fluid will be drained from the damper
spring chamber through the oil hole and cause
8.2 US oz (243 cm
3
) of fork fluid to be left in the
fork damper spring chamber.
0°C/32°F
10°C/50°F
20°C/68°F
30°C/86°F
Improper disposal of drained fluids is harmful to
the environment.
NOTICE
Adjustments for Competition 119
Front Suspension Adjustments
5. Place the lower end (axle holder) of the slider
in a vise with a piece of wood or soft jaws to
avoid to damage.
Over-tightening the vise can damage the axle
holder.
6. Push out the fork damper piston rod from the
axle holder of the slider by pushing the fork
damper.
Apply pressure to the fork damper and insert
the piston base (9) or mechanic's stopper tool
between the axle holder and fork center bolt
lock nut (2).
Measure the thread length again.
Standard:
0.43 – 0.51 in (11 – 13 mm)
7. Install the push rod (10) into the fork damper
piston rod until it stops.
8. Apply fork oil to new O-ring (11) and install
it to the fork center bolt (12).
Install the fork center bolt to the fork damper
piston rod. Tighten the fork center bolt fully
by hand.
NOTICE
(2) fork center bolt lock nut (11) O-ring (new)
(9) piston base (12) fork center bolt
(10) push rod
(9)
(2)
(10)
(12)
(11)
3. Install the collar (3) to the C-ring (4) of the
fork damper assembly (5) as shown.
Install the washer (6) and spring retainer (7)
to the fork damper assembly.
Make sure the black side of the washer is
seated on the collar side.
4. Blow out the oil completely off the fork
spring (8) using compressed air.
Install the fork spring to the fork damper
assembly (5).
Install the fork damper assembly to the fork
assembly (1).
(5)
(7)
(6)
(4)
(4)
(3)
(3)
(5)
(8)
(1)
(3) collar (6) washer
(4) C-ring (7) spring retainer
(5) fork damper assembly
(1) fork assembly (8) fork spring
(5) fork damper assembly
(cont’d)
120 Adjustments for Competition
Front Suspension Adjustments
9. Measure the length of the fork center bolt lock
nut (2) and fork center bolt (12) clearance.
Standard
: 0.06 – 0.08 in (1.5 – 2.0 mm)
If the clearance is out of specification, check the
fork center bolt lock nut and fork center bolt
installation.
(2) fork center bolt lock nut (12) fork center bolt
10. Tighten the fork center bolt lock nut (2) to the
fork center bolt (12) closely by hand. Tighten
the fork center bolt lock nut to the specified
torque:
16 Ibf·ft (22 N·m, 2.2 kgf·m)
(2) fork center bolt lock nut
(12) fork center bolt
11. Remove the piston base or mechanic's stopper
tool while pushing the fork damper.
Apply locking agent to the fork center bolt
threads.
Install the fork center bolt (12) to the axle
holder and tighten it to the specified torque:
51 Ibf·ft (69 N·m, 7.0 kgf·m)
(12) fork center bolt
12. Measure the length between the axle holder
and outer tube.
Standard:
12.5 ± 0.1 in (316.5 ± 2 mm)
13. Compare the length (13) at assembly and at
disassembly. They should be the same length.
(13) length
(2)
(12)
0.06 – 0.08 in
(1.5 – 2.0 mm)
(2)
(12)
(12)
(13)
If the length at assembly is longer than at
disassembly, check the fork center bolt and fork
center bolt lock nut installation.
(1) fork assembly (14) fork oil
(1)
(14)
14. Remove the fork damper from the fork.
15. Pour the recommended fork oil (14) into the
fork assembly (1).
Recommended Oil:
HP Fork Oil, SS-19
Front Suspension Adjustments
Adjustments for Competition 121
No mark
Fork Oil Capacity:
Standard 26.20 lbf/in (4.59 N/mm) Fork Spring
Standard oil
capacity
12.3 US oz
(363 cm
3
)
Maximum oil
capacity
13.0 US oz
(384 cm
3
)
Slightly stiffer as
it nears full
compression.
Slightly softer as
it nears full
compression.
Minimum oil
capacity
10.1 US oz
(300 cm
3
)
Optional Softer 25.12 lbf/in (4.4 N/mm) Fork Spring
Standard oil
capacity
12.2 US oz
(360 cm
3
)
Maximum oil
capacity
12.9 US oz
(381 cm
3
)
Slightly stiffer as
it nears full
compression.
Slightly softer as
it nears full
compression.
Minimum oil
capacity
10.1 US oz
(298 cm
3
)
2 scribe marks
Optional Stiffer 27.41 lbf/in (4.8 N/mm) Fork Spring
Standard oil
capacity
12.0 US oz
(356 cm
3
)
Maximum oil
capacity
12.8 US oz
(377 cm
3
)
Slightly stiffer as
it nears full
compression.
Slightly softer as
it nears full
compression.
Minimum oil
capacity
9.9 US oz
(294 cm
3
)
3 scribe marks
Be sure the oil capacity is the same in both fork
legs.
(cont’d)
16. Install a new O-ring (15) on the fork damper
assembly (5). Apply the recommended fork
oil to the O-ring.
17. Pull up the fork assembly (1) slowly and
install the fork damper assembly into the outer
tube.
(1) fork assembly (15) O-ring (new)
(5) fork damper assembly
18. Insert both fork legs into the fork clamps.
Tighten the fork bridge lower pinch bolts (16)
to the specified torque:
15 Ibf·ft (20 N·m, 2.0 kgf·m)
(15)
(5)
(1)
(16)
(16) fork bridge lower pinch bolts
122 Adjustments for Competition
Front Suspension Adjustments
(19) outer tube (20) top bridge
21. Tighten the fork bride lower pinch bolts (16)
to the specified torque:
15 Ibf·ft (20 N·m, 2.0 kgf·m)
22. Tighten the fork bridge upper pinch bolts (21)
to the specified torque:
16 Ibf·ft (22 N·m, 2.2 kgf·m)
Over-tightening the pinch bolts can deform the
outer tubes. Deformed outer tubes must be
replaced.
NOTICE
(16) fork bridge lower (21) fork bridge upper
pinch bolts pinch bolts
(16)
(21)
19. Tighten the fork damper (17) to the specified
torque using the lock nut wrench (18).
Actual:
25 lbf·ft (34 N·m, 3.5 kgf·m)
Torque wrench scale reading:
23 Ibf·ft (31 N·m, 3.2 kgf·m), using a 20 in
(500 mm) long deflecting beam type torque
wrench.
• Lock nut wrench 07WMA-KZ30100
When using the lock nut wrench, use a 20 in
(500 mm) long deflecting beam type torque
wrench. The lock nut wrench increases the torque
wrench’s leverage, so the torque wrench reading
will be less than the torque actually applied to the
fork damper.
(18)
(17)
(17) fork damper (18) lock nut wrench
20. For ease of releasing air pressure after the
forks are installed, loosen the fork bridge
lower pinch bolts and position the outer tubes
so that the fork air pressure release screws are
in front of the compression damping adjusters.
Align the top of the outer tube (19) with the
top surface of the top bridge (20).
(19)
(20)
Align
23. Clean the threads of the fork protector socket
bolts (22) and axle holder thoroughly.
Apply locking agent to the bolt threads.
Install the fork protectors (23), fork protector
bolts.
Tighten the fork protector socket bolts to the
specified torque:
5.2 Ibf·ft (7 N·m, 0.7 kgf·m)
(23)
(23)
(22)
(22)
(22) fork protector socket bolts
(23) fork protectors
24. Align the brake caliper (24) and hose (25)
with the left fork leg, making sure that the
brake hose is not twisted. An improperly
routed brake hose may rupture and cause a
loss of braking efficiency.
25. Assemble the stay B (26), brake hose (25) and
stay A (27). Install and tighten them to the left
fork protector using the brake hose clamp
bolts (28).
Adjustments for Competition 123
Front Suspension Adjustments
(24) brake caliper
(25) brake hose
(26) stay B
(27) stay A
(28) brake hose clamp bolts
(29) brake caliper mounting bolts
27. Clean the surfaces where the axle and axle
clamps contact each other.
Apply grease to each dust seal lips of the front
wheel.
Install the left side collar (30) and right side
collar (31) into the wheel hub.
(32)
(33)
26. Clean the threads of the brake caliper
mounting bolts (29) and brake caliper
thoroughly.
Apply locking agent to the bolt threads.
Install the brake caliper (24) on the slider and
tighten the brake caliper mounting bolts to the
specified torque:
22 Ibf·ft (30 N·m, 3.1 kgf·m)
(24)
(26)
(25)
(27)
(28)
(29)
(30) left side collar (31) right side collar
28. Install the front wheel between the fork legs
while inserting the disc between the pads,
being careful not to damage the pads.
29. Insert the front axle shaft through the forks
and wheel hub from the right side. Make sure
that the front axle shaft is seated firmly onto
the left fork leg clamp inner surface. Tighten
the front axle nut (32) to the specified torque:
65 Ibf·ft (88 N·m, 9.0 kgf·m)
Tighten the left axle pinch bolts (33) to the
specified torque:
15 Ibf·ft (20 N·m, 2.0 kgf·m)
(30) (31)
(32) front axle nut
(33) left axle pinch bolts
(34) handlebar
(35) mounting rubbers, washers and handlebar lower
holder nuts
31. Install the number plate (page 103).
30. Install the handlebar (34), mounting rubbers,
washers and handlebar lower holder nuts (35)
and tighten the handlebar holder nuts to the
specified torque:
32 Ibf·ft (44 N·m, 4.5 kgf·m)
(34)
(35)
(cont’d)
124 Adjustments for Competition
Front Suspension Adjustments
32. With the front brake applied, pump the fork
up and down several times to seat the axle and
check front brake operation.
33. While keeping the forks parallel, alternately
tighten the right axle pinch bolts (36) to the
specified torque:
15 Ibf·ft (20 N·m, 2.0 kgf·m)
34. Install the disc cover (37) and tighten the disc
cover socket bolts (38) to the specified torque:
10 Ibf·ft (13 N·m, 1.3 kgf·m)
(37) disc cover (38) disc co ver socket bolts
35. Turn the rebound damping (39) and
compression damping (40) adjuster screws
back to their original settings.
(36)
(37)
(38)
(39) rebound damping adjuster
(40) compression damping adjuster
(39)
(40)
(36) right axle pinch bolts
To avoid damage when torquing the axle pinch
bolts, be sure the axle is seated firmly onto the
left fork leg clamp inner surface.
NOTICE
Adjustments for Competition 125
Rear Suspension Adjustments
The rear suspension can be adjusted for the
rider’s weight and riding conditions by changing
the spring pre-load and the rebound and
compression damping.
The rear shock absorber assembly includes a
damper unit that contains high pressure nitrogen
gas. Do not attempt to disassemble, service, or
dispose of the damper; see your dealer. The
instructions found in this owner’s manual are
limited to adjustments of the shock assembly
only.
Puncture or exposure to flame may also result in
an explosion, causing serious injury.
Service or disposal should only be done by your
dealer or a qualified mechanic, equipped with the
proper tools, safety equipment and the Honda
Service Manual.
If your CRF is new, put enough part-throttle
break-in time (about one hour) on it to ensure
that the suspension has worked in.
Rear Suspension Spring Pre-Load
Pre-load should be adjusted when the engine is
cold because it is necessary to remove the
muffler (page 100).
An optional pin spanner is available for turning
the lock nut and adjusting nut to adjust spring
pre-load.
1. Place a workstand under the engine to raise
the rear wheel off the ground.
2. Loosen the connecting tube clamp screw and
remove the subframe’s three mounting bolts,
then remove the subframe. See page 36.
3. Check that the spring preload is adjusted to
the standard length. Adjust as necessary by
loosening the lock nut (1) and turning the
adjusting nut (2).
Each complete turn of the adjusting nut
changes the spring length by 0.06 in (1.5 mm).
4. After adjustment, hold the adjusting nut and
tighten the shock spring lock nut to the
specified torque:
32 Ibf·ft (44 N·m, 4.5 kgf·m)
(1) lock nut (3) pin spanners
(2) adjusting nut (4) spring length
T
o increase spring pre-load:
Loosen the lock nut with the optional pin
spanners (3) and turn the adjusting nut to shorten
the spring length (4). Do not shorten to less
than:
9.9 in (251 mm)
To decrease spring pre-load:
Loosen the lock nut with the optional pin
spanners (3) and turn the adjusting nut to
increase the spring length (4). Do not increase to
more than:
10.4 in (264 mm)
Each turn of the adjuster changes spring length
and spring pre-load. One turn equals: spring
length/spring pre-load:
0.06 in (1.5 mm)/17.20 lb (7.80 kg)
(1)
(4)
(2)
(3)
Pin spanners should be used for turning the lock
nut and adjusting nut. See page 156 for optional
pin spanners.
Spring pre-load length (Standard spring)
Standard:
10.28 in (261.2 mm)
Min. : 9.9 in (251 mm)
Spring pre-load length (Optional spring)
Min. (Softer, 285.5 lbf/in (50.0 N/mm)):
9.9 in (252 mm)
Min. (Stiffer, 307.7 lbf/in (53.9 N/mm)):
9.8 in (249 mm)
Rear Suspension Adjustments
126 Adjustments for Competition
(3) rebound damping adjuster
To adjust to the standard position:
1. Turn the adjuster clockwise until it will no
longer turn (lightly seat). This is the full hard
position.
2. Turn the adjuster counterclockwise 11 clicks,
and make sure that the punch marks on the
adjuster and the shock absorber are aligned.
Rear Suspension Damping
Compression Damping
Compression damping may be adjusted in two
stages with separate adjusters.
The high speed damping adjuster (1) is ef fective
when damping adjustment is desired for high
speed operation. The low speed damping adjuster
(2) should be used when damping adjustment is
desired at relatively low speeds.
• Both the high and low speed damping can be
increased by turning the appropriate adjuster
clockwise.
• Adjust the high speed adjuster in 1/12 turn
increments.
(1) high speed damping adjuster
(2) low speed damping adjuster
High Speed Damping:
The high speed damping can be adjusted by
turning the hexagonal portion of the compression
adjuster.
The high speed damping adjuster has 3 1/2 turn
or more.
To adjust to the standard position:
1. Turn the adjuster clockwise until it will no
longer turn (lightly seats). This is the full hard
setting.
2. Turn the adjuster counterclockwise 2 turns
and the punch marks are aligned.
Low Speed Damping:
The low speed damping can be adjusted by
turning the center screw of the compression
adjuster.
The low speed adjuster has 13 positions or more.
Turning the adjuster one full turn clockwise
advances the adjuster 4 positions.
To adjust to the standard position:
1. Turn the adjuster clockwise until it will no
longer turn (lightly seat). This is the full hard
setting.
2. Turn the adjuster counterclockwise 8 clicks,
and make sure that the punch marks are aligned.
Rebound Damping
The rebound damping adjuster (3) is located at
the lower end of the shock absorber.
It has 17 positions or more. Turning the adjuster
one full turn advances the adjuster 6 positions.
• Rebound damping can be increased by turning
the adjuster clockwise.
(2)
(1)
(3)
Adjustments for Competition 127
Rear Suspension Adjustments
Example:
Unloaded
= 23.6 in (600 mm)
– Loaded = 19.5 in (495 mm)
Race Sag = 4.1 in (105 mm)
4. Calculate the race sag dimension.
To do this, subtract the
loaded with rider
dimension (step 3) from the unloaded
dimension (step 2).
Standard Race Sag:
4.1 in (105 mm)
Adjust spring pre-load as necessary to obtain
the desired handling results.
Decreasing the race sag dimension (example:
3.7 in, 95 mm) improves turning ability for
tight terrain at the cost of slightly reduced
straight line stability.
Increasing the race sag dimension (example:
4.5 in, 115 mm) may improve stability on
faster terrain with less turns, but will reduce
turning performance slightly and may upset
the balance between the front and rear
suspension, producing a harsher ride. This
will happen if the adjustment shifts the
effective wheel travel toward the more
progressive end of its range.
Rear Suspension Race Sag
Setting the proper race sag (ride height) is very
important for competition use.
Race sag refers to the amount of rear wheel
travel used by your CRF at rest, ready to ride,
with you on the seat. As a general rule of thumb,
the race sag dimension should be about one-third
of the maximum travel.
On your CRF, ride height is changed by
adjusting the rear suspension spring pre-load.
Spring Pre-load & Race Sag
Adjustment
The following adjustment procedure establishes
the correct starting point for any suspension
tuning — the proper rear suspension spring pre-
load adjustment for your specific needs.
Your CRF should be at normal racing weight,
including fuel, oil and coolant. You should be
wearing all your normal protective apparel. You
will need two helpers.
To calculate the proper adjustment, it is necessary
to measure between two fixed points — from the
center of the rear fender mounting bolt to the
center of the chain adjuster lock nut as illustrated
here — for three different situations:
3. Measure the
loaded with rider dimension.
Remove the workstand. With two helpers
available, sit as far forward as possible on
your CRF’s seat, wearing your riding apparel.
Ask one helper to steady your CRF perfectly
upright so you can put both feet on the pegs.
Bounce your weight on the seat a couple of
times to help the suspension overcome any
situation and settle to a good reference point.
UNLOADED MEASUREMENT
(without rider)
EXAMPLE: 23.6 in (600 mm)
REAR FENDER MOUNTING BOLT
CHAIN ADJUSTER LOCK NUT
REAR FENDER MOUNTING BOLT
CHAIN ADJUSTER LOCK NUT
LOADED MEASUREMENT
(with rider)
EXAMPLE: 19.5 in (495 mm)
unloaded: motorcycle on an optional workstand
with rear suspension fully extended, no rider.
loaded with rider: motorcycle on ground, with
rider.
loaded without rider: motorcycle on ground,
without rider
1. Support your CRF on an optional workstand
with the rear wheel off the ground.
2. Measure the
unloaded dimension.
Ask the other helper to measure the
loaded
with rider
dimension.
(cont’d)
Rear Suspension Adjustments
128 Adjustments for Competition
LOADED MEASUREMENT
(without rider)
EXAMPLE: 21.6 in (550 mm)
Example:
Unloaded
= 23.6 in (600 mm)
– Loaded = 21.7 in (550 mm)
Sag = 2.0 in (50 mm)
(Without Rider)
6. Calculate the
free sag dimension.
To do this, subtract the
loaded without rider
dimension (step 5) from the unloaded
dimension (step 2).
Free sag indicates the distance your rear
suspension should sag from the weight of the
sprung portion of your CRF.
With the spring pre-load set to obtain the
proper race sag, the rear suspension should
sag 0.4 to 1.0 in (10 to 25 mm).
If the rear of your CRF sags less than 0.4 in
(10 mm) from its own weight, the spring is
too stiff for your weight. It is not compressed
enough, reduce the spring pre-load or replace
the shock spring with a softer spring.
5. Measure the
loaded without rider dimension.
Do this with your CRF set at the standard race
sag.
A spring that is too stiff for your weight will not
allow the rear tire to hook up under acceleration
and will pass more bumps on to you.
Spring Rates
If you are lighter or heavier than the average
rider and cannot set the proper ride height
without altering the correct spring pre-load,
consider an aftermarket rear shock spring.
A spring that is too soft for your weight forces
you to add excessive spring pre-load to get the
right race sag and, as a result, the rear end of the
motorcycle is raised. This can cause the rear
wheel to unload too much in the air and top out
as travel rebounds. The rear end may top out
from light braking, or kick sideways over lips
and square-edged terrain. It may even top-out
when you dismount your CRF.
Because of the great absorption quality of the
shock bumper rubber, it may be difficult for you
to notice when your CRF’s suspension is
bottoming. Some riders may think the damping
or perhaps the leverage ratio is too harsh. In
reality, the problem is most likely insufficient
spring pre-load or a spring that is too soft. Either
situation prevents utilizing the full travel.
Keep in mind that a properly adjusted suspension
system may bottom slightly every few minutes at
full speed. Adjusting the suspension to avoid this
occasional bottoming may cost more in overall
suspension performance than it is worth.
Suspension Adjustments for Track Conditions
Adjustments for Competition 129
Soft Surface
On soft ground, sand, and especially mud,
consider increasing compression damping front
and rear.
Sand often requires a bit more rebound damping
to minimize rear end kick. Although sand bumps
are usually larger, there’s more distance between
them, giving the shock more time to recover.
You may want a little bit stiffer front suspension
for sand tracks to help keep the front end up and
improve straight-line stability.
In a muddy event, stiffer aftermarket springs
front and rear may help, especially if you are
heavier than the average rider. Your CRF may be
undersprung because of the added weight of the
clinging mud. This additional weight may
compress the suspension too much and affect
traction.
Hard Surface
For a fast, hard track with no lar ge jumps, you
can probably run the same spring as normal, but
run softer damping both ways-compression and
rebound. If you run softer rebound damping, the
wheel will follow the rough ground and small
bumps much better, and you will hook up better.
With a lot of rebound damping, the wheel returns
very slowly and doesn’t contact the ground
quickly enough after each bump. The result is a
loss of traction and slower lap times.
Follow the procedures described below to accurately adjust your CRF , using the methods described on pages 110 – 129. Remember to make all adjustments in
one-click or 1/12 turn increments. Test ride after each adjustment.
Front Suspension Adjustment
Adjustments for Type of Track
Adjustments for Too Soft/Stiff Damping
Hard-surfaced track
Sand track
Mud track
Begin with the standard setting. If the suspension is too stiff/soft, adjust according to the char t below.
Adjust to a stiffer position.
Example: – Turn the compression damping adjuster to a stiff er position.
– Install the optional stiff spr ing. (Adjust compression damping to a softer position and rebound damping to a stiff er position at
this time.)
Adjust to a stiffer position because mud build-up increases your CRF’s weight.
Example: – Turn the compression damping adjuster to a stiff er setting.
– Install the optional stiff spr ing.
Soft
suspension
Symptom
Initial travel too soft:
• Steering is too quick.
• Front end darts while cornering or riding in a straight line.
Middle travel too soft:
• Front end dives when cornering.
Final travel too soft:
• Bottoms on landings.
• Bottoms on large bumps, especially downhill bumps.
Entire travel too soft:
• Front end shakes.
• Fork bottoms over any type of terrain.
Action
– Test stiffer compression damping adjustments in one-click increments.
– Test stiffer rebound damping in one-click increments.
If suspension isn’t stiff in initial travel:
– Test stiffer compression damping adjustments in one-click increments.
If initial travel becomes stiff because of the abo ve adjustment:
– Reduce the rebound damping in one-click increments.
– Test softer compression damping adjustments in one-click increments.
If that doesn’t solve the problem, install the optional stiff spr ing.
If initial and middle travel aren’t stiff:
– Test stiffer compression damping adjustments in one-click increments.
If initial and middle travel are stiff:
– Install the optional stiff spr ing.
If initial travel is stiff after installing the optional stiff spr ing:
– Test softer compression damping adjustments in one-click increments.
If initial travel is still soft after installing the optional stiff spr ing:
– Test stiffer compression damping adjustments in one-click increments.
If final travel is still soft after installing the optional stiff spr ing:
– Increase the fork oil capacity in increments of 0.2 US oz (5 cm
3
).
– Install the optional stiff spr ing.
– Test stiffer compression damping adjustments in one-click increments.
– Increase rebound damping in one-click increments.
Suspension Adjustment Guidelines
130 Adjustments for Competition
Symptom
Initial travel too stiff:
•
Stiff on small bumps while riding at full throttle in a str aight line.
• Stiff on small cornering bumps.
• Front end wanders while riding at full throttle in a str aight line.
Middle travel too stiff:
• Stiff on bumps when cornering.
• Front end wanders when cornering.
• Stiff suspension on bumps, especially downhill bumps.
• While braking, front end dives during initial travel, then feels stiff.
Final travel too stiff:
• Doesn’t bottom on landings, but feels stiff.
• Stiff on large bumps, especially downhill bumps.
• Stiff on large bumps when cornering.
Entire travel too stiff:
• Stiff suspension on any type of terrain.
Stiff
suspension
Action
– Test softer compression damping adjustments in one-click increments.
– Reduce the rebound damping adjustments in one-clic k increments.
– Check for dirt in the dust seals. Check the fork oil for any contamination.
If the front end dives while cornering after the above adjustment:
Reduce the rebound damping in one click increments. If that doesn’t solve the
problem, install the optional stiff spring.
If the stiff spring makes the suspension too stiff over the full range of travel:
test softer compression damping adjustments in one-click increments until the
desired compression damping for initial travel is obtained.
If initial travel isn’t stiff:
– Test stiffer compression damping adjustments in one-click increments. (This
should produce smooth fork action from initial to middle tr avel.)
If initial and middle travel is stiff:
– Test softer compression damping adjustments in one-click increments.
– Reduce the rebound damping in one-click increments.
If initial and middle travel aren’t stiff:
– Test stiffer compression damping adjustments in one-click increments. (This
should produce smooth fork action from initial to middle tr avel.)
If final travel is still stiff after the abo ve adjustment, or
If initial and middle travel becomes stiff:
– Install the optional soft spr ing.
– Test softer compression damping adjustments in one-click increments.
If the entire travel feels stiff after the above adjustment:
– Test softer compression damping adjustments in one-click increments until the
desired initial travel compression damping is obtained.
– Lower the oil capacity by 0.2 US oz (5 cm
3
).
– Test softer compression damping adjustments in one-click increments.
– Reduce the rebound damping in one-click increments.
– Lower the oil capacity by 0.2 US oz (5 cm
3
).
Suspension Adjustment Guidelines
Adjustments for Competition 131
Rear Suspension Adjustment
Adjustments for Type of Track
Symptoms and Adjustment
• Always begin with the standard settings.
• Turn the low speed compression and rebound adjusters in one-clic k increments, and the high speed compression adjuster in 1/12 t urn increments at a time. Adjusting two
or more clicks or turns at a time may cause you to pass over the best adjustment. Test ride after each adjustment.
• If, after setting, the suspension feels unusual, find the corresponding symptom in the tab le and test stiffer or softer compression and/or rebound damping adjustments until
the correct settings are obtained as descr ibed.
Hard-surfaced track
Sand track
Mud track
Begin with the standard settings. If the suspension is too stiff/soft, adjust according to the char t below.
Lower the rear end (to improve front wheel stability) by increasing Race Sag (reduce spring pre-load).
Example: – Turn the compression damping adjuster and, especially, rebound damping adjuster to a stiffer setting.
– Increase standard Race Sag (+0.2 to 0.4 in/5 to 10 mm).
Adjust to a stiffer position because mud build-up increases your CRF’s weight.
Example: – Adjust the compression and rebound damping adjusters to stiff er settings.
– Install the optional stiff spr ing.
– Reduce standard Race Sag (–0.2 to 0.4 in/5 to 10 mm).
Stiff suspension
Soft suspension
Suspension bottoms
Symptom
Suspension feels stiff on small
bumps
Suspension feels stiff on large
bumps
Entire travel too stiff
Entire travel too soft
Rear end sways
Suspension bottoms at landing
after jumping
Suspension bottoms after landing
Suspension bottoms after end of
continuous bumps
Action
1. Test softer low speed compression adjustment.
2. If it still feels stiff, further test softer low and high speed compression adjustments simultaneously.
1. Test softer high speed compression adjustment.
2. If it still feels stiff, further test softer low and high speed compression adjustments simultaneously.
1. Test softer high and low speed compression adjustments and rebound adjustment sim ultaneously.
2. If it still feels stiff, replace the spring with a softer spring (optional) and begin with the standard settings to
softer settings.
1. Test stiffer high and low speed compression adjustments simultaneously.
2. If it still feels soft, replace the spring with a stiffer spring (optional) and begin with the standard settings to
stiffer setting.
1. Test stiffer high and low speed compression adjustments and rebound adjustment to stiff er settings
simultaneously.
1. Test stiffer high speed compression adjustment.
2. If it still bottoms, test stiffer high and low speed compression adjustments, and replace the spring with a
stiffer spring (optional) if necessary.
1. Test stiffer low speed compression adjustment.
2. If it still bottoms, test stiffer high and low speed compression adjustments, and replace the spring with a
stiffer spring (optional) if necessary.
1. Test softer rebound dumping adjustment.
2. If it still bottoms, test stiffer high and low speed compression adjustments and softer rebound damping
adjustment, and replace the spring with a stiffer spring (optional) if necessary.
Suspension Adjustment Guidelines
132 Adjustments for Competition
Adjustments for Competition 133
Tuning Tips
An optional PGM-FI setting tool can change the
ignition timing and amount of the fuel injection
(page 157).
Be sure to observe the PGM-FI setting by
checking the spark plug.
Spark Plug Reading
Refer to Spark Plug on page 67.
The following procedure is recommended. You
may not get an accurate reading if you simply
turn off the engine and pull the plug for
inspection.
Use a new spark plug. Inspect the plug before
installing it.
Using spark plugs with an improper heat range
or incorrect reach can cause engine damage.
Ride for 10 – 15 minutes before taking a plug
reading. A new plug will not color immediately.
Before removing the spark plug, clean the spark
plug area thoroughly to prevent dirt from
entering the cylinder.
To obtain an accurate reading of a new spark
plug:
1. Accelerate at full throttle on a straight.
2. Depress and hold the engine stop button and
pull the clutch lever in.
3. Coast to a stop.
4. Remove the spark plug.
5. Use a magnifying glass to inspect the spark
plug. The porcelain insulator (1) around the
center electrode (2) should appear clean and
colorless with a gray ring around the center
electrode where it exits the porcelain.
Light gray or white color streaks the porcelain
insulator and center electrode indicate lean
air-fuel mixture. Wet or black sooty streaks
on the porcelain indicate rich air-fuel mixture.
NOTICE
Condition
Normal
Overheating
(Lean)
Wet
(Rich)
Spark Plug Appearance
Dark brown to light tan
color with dry electrode
Light gray or white color
Wet or sooty
Mixture
correct
lean
rich
An improperly tightened spark plug can damage
the engine. If a plug is too loose, a piston may
be damaged. If a plug is too tight, the thr eads
may be damaged.
NOTICE
(1) porcelain insulator (3) side electrode
(2) center electrode
Spark Plug Coloring Guidelines
Remember that in addition to improper air-fuel
mixture:
• A lean condition can be caused by air leaks in
the inlet tract or exhaust system, the passage
of too much air because of the use of the
wrong air cleaner, use of a less-restrictive
aftermarket exhaust system.
• A rich condition can be caused by a plugged
or dirty air cleaner, use of a more-restrictive
aftermarket exhaust system, or excessive oil
on the air cleaner.
Excessive smoking will occur.
(2)
(3)
(1)
134 Adjustments for Competition
Steering Damper Adjustment
The steering damper can be adjusted for riding
conditions by using following method:
•
Damping – Turning the steering damper
adjuster adjusts how quickly the steering
damper extends and retracts.
Steering Damper Damping
The steering damper adjuster (1) has 13 positions
or more. Turning the adjuster one full turn
clockwise advances the adjuster six positions. To
adjust the adjuster to the standard setting,
proceed as follows:
Turn the adjuster clockwise until it will no longer
turn (lightly seats). This is the full hard position.
The adjuster is set in the standard position when
the adjuster is turned counterclockwise 9–12
clicks.
Damping can be increased by turning the adjuster
clockwise.
Always start with full hard when adjusting
damping.
Do not turn the adjuster more than the given
positions or the adjuster may be damaged.
Be sure that the damping adjuster is firmly
located in a detent, and not between positions.
NOTICE
(1) steering damper adjuster
(1)
Adjustments for Competition 135
Steering Damper Adjustment Guidelines
Follow the procedures described below to accurately adjust your CRF , using the methods decribed on this page.
Symptoms and Adjustment
• Always begin with the standard settings.
• Turn the steering damper adjuster in one-click increments at a time. Adjusting two or more clicks at a time may cause you to p ass over the best adjustment.
Test ride after each adjustment.
Symptom
Steering is wobbling on large bumps Adjust the steering damper adjuster to stiffer setting.
Steering is wobbling at sand track Adjust the steering damper adjuster to stiffer setting.
Steering is heavy when cornering Adjust the steering damper adjuster to softer setting.
Action
136 Adjustments for Competition
Chassis Adjustments
Wheelbase
Adjusting your CRF’s wheelbase can offer subtle
changes in overall handling. You may adjust
wheelbase by adding or removing links on the
drive chain. If you change the wheelbase, be
sure to re-check race sag and adjust, if necessary.
In the past, a general rule was lengthen the
wheelbase to add straight line stability, shorten
the wheelbase to improve turning. However, we
suggest you do not lengthen the wheelbase of
your CRF unless you are racing on a track with
more fast sections than normal.
As a general recommendation, keep the
wheelbase as short as possible. This positions
the wheels closer together, improves turning
response, increases weighting (traction) on the
rear wheel, and lightens weighting on the front
wheel.
With your CRF, you will probably find that the
standard setting or a shorter wheelbase will of fer
more overall benefits.
(1)
(2)
(3)
(1) standard position
0 in (0 mm)
(2) top of outer tube
(3) upper fork bridge
Fork Height/Angle
The position of the fork tubes in the clamps is
not adjustable. Align the groove in the outer tube
with the top surface of the upper fork bridge.
Standard Position
The standard position (1) align the top of the
outer tube (2) (not the top of the fork cap) with
the top surface of the upper fork bridge (3).
The following suggestions may improve a
specific concern. Subtle changes in overall
handling may also be noted.
Rear End
If you have a problem with rear wheel traction,
raise the rear end of your CRF by increasing the
rear suspension spring pre-load. Instead of
running 4.1 in (105 mm) of sag, you can run 3.7 in
(95 mm) so the rear of the motorcycle will sit a
little higher. This should produce more traction
because of the change to the swingarm and
location of your CRF’s center of gravity.
If you have a problem with the steering head
shaking when you use the front brake hard or if
your CRF wants to turn too quickly, lower the
rear of the motorcycle by reducing the rear
suspension spring pre-load. This will increase
fork rake and trail and should improve stability in
a straight line. The effective suspension travel
will be transferred toward the firmer end of
wheel travel.
Keep the race sag adjustment (page 127) in the
3.7 – 4.5 in (95 – 115 mm) range.
Adjustments for Competition 137
Gearing
You can “adjust” the power delivery of the
standard engine to suit track conditions by
changing gearing. This allows you to utilize a
different portion of the engine’s power range at a
given throttle setting. New gearing may provide
the change you are looking for without the need
to consider further modifications.
The portion of your engine’s power range you
use can be adjusted by changing the final drive
ratio with different sized rear sprockets. Gearing
changes allow you to more closely match the
type of terrain and the available traction.
Normally, a change of one tooth on the rear
sprocket will be sufficient.
There is a choice of both higher and lower final
drive ratios with two optional aluminum driven
sprockets. Like the optional springs, these
sprockets are listed in the Optional Parts List
section of this manual (page 156).
Unless you have the required mechanical
knowhow, tools, and Honda Service Manual,
sprocket changing should be done by your dealer.
Higher Gearing (less driven sprocket teeth)
• increases top speed in each gear (provided the
engine will pull the higher gearing)
• reduces frequency of shifting (wider gear
ratios)
• reduces engine rpm at a given throttle setting
or ground speed (which may allow better rear
wheel traction on slippery or loose terrain)
However:
• the engine may not pull the higher gearing
• the spacing between gears may be too wide
• engine rpm may be too low
Lower Gearing (more driven sprocket teeth)
• decrease top speed in each gear
• increases frequency of shifting (narrower gear
ratios)
• increases engine rpm at a given throttle
setting or ground speed (which may provide
more power-to-the-ground on good traction
surfaces)
However:
• spacing between gears may be too narrow
• engine rpm may be too high
Some tracks may be watered heavily prior to the
first race, then lightly or not at all during the day .
This results in a track surface that is slippery
during the first few races, then changes from
good to great and back to good, and possibly
ends the day with a slick rock-hard consistency.
Ideally, your gearing should be adjusted to suit
all these conditions.
• Wet and slippery or sandy conditions: use a
higher gear (less teeth) to keep engine rpm
down, and avoid unwanted wheelspin. The
engine may bog in certain corners so you ’ll
need to slip the clutch to compensate;
downshifting may be too drastic a change in
speed.
• Average conditions: use the standard sprocket.
• Hard (but not slippery) track conditions: use
lower gearing (more teeth) to keep the engine
rpm high where the engine produces the most
power. This may require an extra upshift on
certain sections or perhaps you can just rev it
out a bit longer.
For tight tracks, consider lower gearing to avoid
having to slip the clutch frequently. Repeated
fanning or pulling of the clutch lever in a turn to
raise engine rpm may eventually damage the
clutch system.
A gearing change may help for riding in sand,
where you want to keep the front end light so it
can float from the peak of one sand whoop to the
next. Generally, with higher gearing, it is easier
to maintain that perfect attitude (maximum rear
wheel traction and a light front end) because you
remain in the powerband longer in each gear.
The higher gearing allows you to steer more
efficiently with throttle control and body English.
If you are riding a track with sections where you
choose to over-rev the engine temporarily rather
than shifting up, higher gearing might help.
Sometimes you have to sacrifice performance on
one section of the track to gain a better overall
time. Your goal is the fastest overall lap time,
even if the trade-off is gearing that feels wrong in
some sections.
If you decide to try a gearing change, have
someone check your times with a stopwatch
(before and after the change) to get an accurate
appraisal of the gearing change. “Seat-of-the-
pants” feelings can’t be trusted. Eliminating
wheelspin with a gearing change can make you
feel like you’re going slower when, in reality,
you’ve decreased your time by increasing your
speed with better traction.
These gearing recommendations should be
evaluated by considering your ability, your riding
style, and the track.
138 Adjustments for Competition
Tire Selection for Track Conditions
Choosing the correct tire tread pattern and rubber
compound can affect your placing in competition.
The tires on your CRF offer a “happy medium”
for the variety of soil conditions the majority of
riders are likely to encounter.
Experienced competitors often switch to tires
developed for specific terrain conditions. If you
do switch, stay with the factory recommended
sizes. Other tires may affect handling or
acceleration.
Be aware that tire sizes (width and aspect ratio)
do vary from manufacturer to manufacturer or
even among tires made by the same
manufacturer. Variations in tires, especially the
sidewall profile, can change the attitude of your
CRF and its handling. Tire variations that raise
or lower the rear of your CRF have a more
significant effect on handling than variations in
front tires which, generally, don’t vary as much.
Often, you can see or feel the change in tire size.
Another way to check is to measure the rolling
circumference of the old and new tires. A higher
profile tire will have a larger rolling
circumference.
If you do switch to tires designed for special
terrain use, remember they will be less
acceptable in other circumstances. For example,
an aggressive mud tire will give excellent grip on
wet, loamy terrain, but less impressive grip on a
hard surface.
If you choose a tire with a sticky compound for
added traction, remember that it may transfer
additional loads to the transmission because it
grips so well, especially when riding in situations
that normally place unusual demands on the
transmission.
Complete consumer information can be obtained
from the various tire manufacturer
representatives and dealers.
Some general recommendations for specific
terrain follow:
Hard, Slick Soil
Use tires with many relatively short knobs that
are close together in order to obtain the lar gest
possible contact patch on the surface. The rubber
compound needs to be softer for hard ground in
order to hook up, but not so soft that the knobs
roll over easily and affect holding a straight line.
These tires tend to wear more quickly than
standard tires because of the combination of soft
rubber and hard terrain.
Muddy Soil
Use a more open tread pattern to avoid clogging.
For these conditions, the relatively long knobs
will probably be made from a harder rubber
compound to reduce any tendency to bend back
under acceleration or wear quickly.
Loose, Sandy Soil
Use a tire that is similar in construction to those
needed for tacky soil and mud, but with a few
more knobs.
Adjustments for Competition 139
Personal Fit Adjustments
The following suggestions may make your ride
both more comfortable and more responsive to
your control input.
Control Positioning
• Position the control levers so that you can use
them comfortably when seated and standing.
• Adjust the mounting bolt torque of the clutch
and brake lever assemblies so that they can
rotate on the handlebar in a fall. If an
assembly does not rotate, it may bend or
break a control lever. Make sure that the
bolts are torqued securely enough to prevent
slippage during normal operation.
Apply Pro Honda Hondalock or an equivalent to
the threads of these bolts prior to adjustment to
help ensure the correct torque is retained.
Tighten the top bolts first.
(1) control lever mounting bolts
As an alternative, consider wrapping the
handlebar area under the control assemblies with
teflon tape. Then tighten the assemblies to their
normal torque. Upon impact, the fully-tightened
assemblies should rotate on the teflon tape.
• Position the shift lever and brake pedal so
they are close to your boot for rapid access,
but not so close that either is depressed when
sitting or standing comfortably on your CRF.
Handlebar Position, Width & Shape
• Position the handlebar so that both gripping
the bar and operating the controls is
comfortable while both seated and standing,
while riding straight ahead and turning.
Tighten the forward bolts first.
• The handlebar position may be moved
rearward either 0.12 in (3 mm) (using optional
handlebar lower holders) or 0.24 in (6 mm)
(by rotating the standard holders 180 degrees).
Refer to the Service Manual for installation
instructions. Be sure to check control cable
and wiring harness routing after the
adjustment.
• Chamfer the edges to remove burrs and other
irregularities or roughness after sawing the
handlebar.
• An alternate handlebar shape, through varying
rise or rearward sweep dimensions, will
provide further adjustment to riding position
and may better suit your particular body size
or riding style. Each of the ergonomic
dimensions of the machine were determined
to suit the greatest possible number of riders
based on an average size rider.
(1)
(1)
• Handlebar width can be trimmed with a
hacksaw to better suit your particular shoulder
width and riding preference. Think this
through carefully and cut off just a small
amount at a time from both sides equally. It is
obviously much easier to make the handlebar
narrower than it is to add material.
Tips 141
Tips
Here’s helpful advice on how to transport and
store your Honda, as well as three
troubleshooting flow charts.
Transporting Your Motorcycle .........................142
Storing Your Honda..........................................143
You & the Environment ...................................144
Troubleshooting................................................145
Transporting Your Motorcycle
142 Tips
If you use a truck or motorcycle trailer to
transport your Honda, we recommend that you
follow these guidelines:
• Use a loading ramp.
• Secure the motorcycle in an upright position,
using motorcycle tie-down straps. Avoid
using rope, which can loosen and allow the
motorcycle to fall over.
To secure your CRF, brace the front wheel
against the front of the truck bed or trailer rail.
Attach the lower ends of two straps to the tie-down
hooks on your CRF. Attach the upper ends of the
straps to the handlebar (one on the right side, the
other on the left), close to the fork.
Check that the tie-down straps do not contact any
control cables or electrical wiring.
Tighten both straps until the front suspension is
compressed about half-way. Too much pressure
is unnecessary and could damage the fork seals.
Use another tie-down strap to keep the rear of the
motorcycle from moving.
We recommend that you do not transport your
CRF on its side. This can damage the
motorcycle, and leaking gasoline could be a
hazard.
Storing Your Honda
Tips 143
(1)
(2)
If you won’t be riding for an extended period,
such as during the winter, thoroughly inspect
your Honda and correct any problem before
storing it. That way, needed repairs won’t be
forgotten and it will be easier to get your CRF
running again.
To reduce or prevent deterioration that can occur
during storage, also follow the following
procedures.
Preparation for Storage
1. Completely clean all parts of your CRF. If
your CRF has been exposed to sea air or salt
water, wash it down with fresh water and
wipe dry.
2. Change the engine oil and filter (page 50).
3. Change the transmission oil (page 53).
4. Remove the radiator cap and coolant drain bolt
and sealing washer (1) at the water pump cover
(2) to drain coolant.
After the coolant has been completely
drained, reinstall the drain bolt with a new
sealing washer and radiator cap.
Tighten the drain bolt to the specified torque:
7 lbf·ft (10 N·m, 1.0 kgf·m)
(1) coolant drain bolt and washer
(2) water pump cover
5. Lubricate the drive chain.
6. Relieve the fuel pressure (page 41) and drain
the fuel from the fuel tank into an approved
gasoline container.
7. Inflate the tires to their recommended
pressures.
8. Place your CRF on an optional workstand or
equivalent to raise both tires off the ground.
9. Stuff a rag into the muffler outlet. Then tie a
plastic bag over the end of the muf fler to
prevent moisture from entering.
10. Store your CRF in an unheated area, free of
dampness, away from sunlight, with a
minimum of daily temperature variation.
11. Cover your CRF with a porous material.
Avoid using plastic or similar non-breathing,
coated materials that restrict air flow and
allow heat and moisture to accumulate.
Removal from Storage
1. Uncover and clean your CRF.
Change the engine and transmission oil if
more than 4 months have passed since the
start of storage.
2. Uncover the end of the muffler and remove
the rag from the muffler outlet.
3. Fill the fuel tank with the recommended fuel
(page 40) and increase the fuel pressure
(page 48).
4. Pour a fresh recommended coolant mixture
(page 54) slowly into the radiator filler hole
up to the filler neck.
Capacity:
1.16 US qt (1.10R)
after disassembly
1.09 US qt (1.03R)
after draining
Lean your CRF slightly right and left several
times to bleed trapped air in the cooling
system.
If the coolant level lowers, add coolant and
repeat the above procedure.
Install the radiator cap securely.
5. Perform all maintenance checks (page 13).
You & the Environment
144 Tips
Owning and riding a motorcycle can be
enjoyable, but you must do your part to protect
nature. When you show respect for the land,
wildlife, and other people, you also help preserve
the sport of off-road riding.
Following are tips on how you can be an
environmentally responsible motorcycle owner.
•
Choose Sensible Cleaners. Use a
biodegradable detergent when you wash your
CRF. Avoid aerosol spray cleaners that
contain chlorofluorocarbons (CFCs) which
damage the atmosphere’s protective ozone
layer. Don’t throw cleaning solvents away;
see the following guidelines for proper
disposal.
•
Recycle Wastes. It’s illegal and thoughtless to
put used engine oil in the trash, down a drain,
or on the ground. Used oil, gasoline, and
cleaning solvents contain poisons that can hurt
refuse workers and contaminate our drinking
water, lakes, rivers, and oceans.
Before changing your oil, make sure you have
the proper containers. Put oil and other toxic
wastes in separate sealed containers and take
them to a recycling center. Call your local or
state office of public works or environmental
services to find a recycling center in your area
and get instructions on how to dispose of
nonrecyclable wastes.
Improper disposal of drained fluids is harmful to
the environment.
NOTICE
Troubleshooting
Tips 145
The items that are serviceable using this Manual
are followed by the page number reference in
parenthesis. The items that require use of an
official Honda Service Manual are followed by
an asterisk (*).
ENGINE DOES NOT START OR IS HARD TO START
CHECK POSSIBLE CAUSES
6. Start by following
normal starting
procedure
ENGINE STARTS
BUT SOON
STOPS
2. Try spark test
*
GOOD SPARK
WEAK OR NO
SPARK
INCORRECT
5. Test cylinder
compression
*
CORRECT
LOW
1. Check the spark plug
condition (P.67)
CORRECT
• Incorrect spark plug
heat range
• Incorrect spark plug gap
• Dirty air cleaner element
• Faulty spark plug (P.67)
• Fouled spark plug (P.67)
• Faulty ECM
*
• Broken or shorted spark
plug wire
• Faulty alternator
*
• Faulty ignition coil
*
• Faulty engine stop
button
*
• Loose or disconnected
ignition system wires
• Faulty CKP sensor
*
• Faulty regulator/rectifier
*
• Faulty condenser
*
• Valve clearance too
small
• Valve stuck open
• Worn cylinder and piston
ring
*
• Damaged cylinder head
gasket
• Improper valve timing
*
• Seized valve
• Insulator leaking
• Improper ignition timing
(Faulty ECM or CKP
sensor)
*
• Fast idle knob stuck
open or damaged
• Fuel contaminated
INCORRECT
3. Check the PGM-FI
system (P.7)
CORRECT
• Faulty PGM-FI system
(P.9)
INCORRECT
4. Check the fuel
pump operation
and inspect the fuel
flow
*
CORRECT
• Faulty fuel pump
*
• Clogged fuel pump filter
(P.44)
ENGINE LACKS POWER
CHECK POSSIBLE CAUSES
1. Check the wheel
spin smoothly
CORRECT
INCORRECT
• Brake dragging
• Worn or damaged
wheel bearings
• Bent axle shaft
• Drive chain too tight
• Faulty valve core
• Punctured tire
• Clutch slipping
• Improperly adjusted
clutch lever freeplay
(P.62)
• Worn clutch discs/plates
(P.65)
• Warped clutch
discs/plates (P.65)
• Weak clutch springs
(P.66)
• Sticking clutch lifter
• Additive in engine oil
• Dirty air cleaner element
• Clogged muffler
• Fast idle knob stuck
open or damaged
• Restricted fuel fill cap
breather tube
• Restricted fuel flow
• Worn piston and
cylinder
*
• Use of poor quality fuel
• Excessive carbon build-
up in combustion
chamber
• Ignition timing too
advance (Faulty ECM)
*
• Lean fuel mixture
• Faulty ECM
*
• Faulty CKP sensor
*
2. Check the tire
pressure (P.95)
CORRECT
INCORRECT
NO
3. Check the engine
speed change
accordingly when
clutch is engaged
*
GOOD
NO GOOD
4. Check the engine
speed increase
GOOD
NO GOOD
6. Check the
ignition timing
*
CORRECT
INCORRECT
5. Check the engine
knocking when
accelerate or run
the engine at high
speed
YES
7. Test cylinder
compression
*
CORRECT
LOW
• Valve clearance too
small
• Valve stuck open
• Worn cylinder and
piston ring
*
• Damaged cylinder head
gasket
• Improper valve timing
*
• Faulty decompressor
system
*
INCORRECT
9. Check the fuel
pump operation
and inspect the
fuel flow
*
CORRECT
• Faulty fuel pump unit
*
• Clogged fuel pump filter
(P.44)
8. Check the PGM-FI
system (P.7)
• Faulty PGM-FI system
(P.9)
INCORRECT
CORRECT
• Incorrect spark plug
• Incorrect spark plug gap
• Dirty air cleaner
element
10. Check the spark
plug condition
(P.67)
INCORRECT
CORRECT
• Engine oil level too high
• Engine oil level too low
• Contaminated engine
oil
11. Check the engine
oil level and
condition (P.50)
INCORRECT
CORRECT
• Faulty oil pump
*
• Faulty pressure relief
valve
*
• Clogged oil passage
*
• Clogged oil strainer
screen
*
12. Remove the
cylinder head
cover and inspect
lubrication
INCORRECT
146 Tips
Troubleshooting
• Incorrect spark plug
heat range
• Incorrect spark plug gap
• Plug not serviced
frequently enough
POOR PERFORMANCE AT LOW AND IDLE SPEED
CHECK POSSIBLE CAUSES
1. Check the spark
plug condition
(P.67)
CORRECT
INCORRECT
• Faulty ECM
*
• Faulty CKP sensor
*
WEAK OR
INTERMITTENT
SPARK
6. Try spark test
*
• Faulty, carbon or wet
fouled spark plug (P.67)
• Faulty ECM
*
• Faulty alternator
*
• Faulty ignition coil
*
• Broken or shorted
spark plug wire.
• Faulty CKP sensor
*
• Loose or disconnected
ignition system wires
• Faulty engine stop
button
*
• Faulty regulator/rectifier
*
• Faulty condenser
*
2. Check the ignition
timing
*
CORRECT
INCORRECT
• Faulty fuel pump unit
*
• Clogged fuel pump filter
(P.44)
4. Check the fuel
pump operation
and inspect the
fuel flow
*
CORRECT
INCORRECT
• Faulty PGM-FI system
(P.9)
3. Check the PGM-FI
system (P.7)
CORRECT
INCORRECT
• Loose insulator
• Damaged insulator
5. Check the insulator
for leaks
CORRECT
INCORRECT
POOR PERFORMANCE AT HIGH SPEED
CHECK POSSIBLE CAUSES
1. Check the ignition
timing
*
CORRECT
INCORRECT
2. Remove the air
cleaner (P.56)
AIR CLEANER
NOT DIRTY
DIRTY
WEAK OR
INTERMITTENT
SPARK
GOOD SPARK
6. Try spark test
*
• Faulty ECM
*
• Faulty CKP sensor
*
• Not cleaned frequently
enough
• Faulty camshaft
*
• Faulty valve springs
*
• Faulty, carbon or wet
fouled spark plug (P.67)
• Faulty ECM
*
• Faulty alternator
*
• Faulty ignition coil
*
• Broken or shorted
spark plug wire.
• Faulty CKP sensor
*
• Loose or disconnected
ignition system wires
• Faulty engine stop
button
*
• Faulty regulator/rectifier
*
• Faulty condenser
*
• Camshaft not installed
properly (P.73)
• Faulty PGM-FI system
(P.9)
3. Check the PGM-FI
system (P.7)
CORRECT
INCORRECT
5. Check the valve
timing
CORRECT
INCORRECT
7. Check the valve
springs
*
GOOD
WEAR
8. Remove and
inspect the cam
lobe height
*
CORRECT
WORN
• Faulty fuel pump unit
*
• Clogged fuel pump filter
(P.44)
4. Check the fuel
pump operation
and inspect the
fuel flow
*
CORRECT
INCORRECT
POOR HANDLING
Steering is heavy
• Steering stem adjusting nut too tight*
• Damaged steering head bearings
• Faulty HPSD*
Either wheel is wobbling
• Excessive wheel bearing play
• Bent rim
• Improperly installed wheel hub
• Excessively worn swingarm pivot bearings
• Bent frame
The motorcycle pulls to one side
• Front and rear wheels not aligned
• Bent fork
• Bent swingarm
• Bent axle shaft
• Bent frame
This section contains dimensions, capacities, and
other technical data.
Vehicle Identification .......................................148
Specifications ...................................................149
Torque Specifications.......................................150
Oxygenated Fuels.............................................153
Competition Logbook ......................................154
Optional Parts List ...........................................156
Spare Parts & Equipment .................................157
Wiring Diagram................................................158
Technical Information
Technical Information 147
Vehicle Identification
148 Technical Information
Serial Numbers
The VIN and engine serial number are required
when you register your CRF. They may also be
required when ordering replacement parts. You
may record these numbers in the Quick
Reference section at the rear of this manual.
The VIN (vehicle identification number) (1) is
stamped on the right side of the steering head.
RIGHT SIDE
(1) VIN
The engine number (2) is stamped on the left
crankcase.
LEFT SIDE
(2) engine number
(1)
(2)
Specifications
Technical Information 149
Overall length
Overall width
Overall height
Wheelbase
Seat height
Footpeg height
Ground clearance
Item English
85.9 in
32.6 in
50.0 in
58.6 in
37.4 in
16.5 in
12.7 in
Metric
Type
Dimension
Frame
F. suspension
R. suspension
Front tire
Twin tube
Telescopic fork
travel 10.8 in (275 mm)
stroke 12.2 in (310 mm)
Pro-link
travel 12.3 in (313 mm)
80/100 – 21 51M
DUNLOP MX51FA
Rear tire
100/90 – 19 57M
DUNLOP
15 psi (100 kPa, 1.0 kgf/cm
2
)
Tire pressure, front (cold)
bias-ply, tubeTire type
15 psi (100 kPa, 1.0 kgf/cm
2
)
Tire pressure, rear (cold)
MX51
Fork oil capacity
(except fork damper)
F. brake, swept area
R. brake, swept area
Fuel
unleaded gasoline, pump
octane number of 91 or
higher
Fuel capacity
Caster angle
Trail length
Single disc brake
51.8 in
2
(334.5 cm
2
)
Single disc brake
60.6 in
2
(391.1 cm
2
)
27°23’
1.5 US gal
4.6 in 118 mm
12.3 US oz 363 cm
3
5.7R
Item English
3.02 x 2.12 in
Cylinder arrangement
Bore and stroke
Displacement
Compression ratio
Valve clearance
(cold)
Intake:
Exhaust:
0.005 ± 0.001 in
(0.12 ± 0.03 mm)
0.011 ± 0.001 in
(0.28 ± 0.03 mm)
Engine oil capacity
After draining
After draining and
oil filter change
After disassembly
After disassembly
Transmission oil
capacity
After draining
Identification number
Idle speed
GQ28A
2,000 ± 100 rpm
Liquid cooled, 4-stroke
Single 5° inclined from
vertical
0.70 US qt
0.73 US qt
0.90 US qt
0.72 US qt
0.79 US qt
Type
Metric
0.67R
0.69R
0.85R
0.68R
0.75R
76.8 x 53.8
mm
Engine
Throttle body
1.09 US qt
1.16 US qt
1.03R
1.10R
Cooling capacity after
draining
after disassembly
Cooling system
13.2 : 1
Clutch type
Transmission
Primary reduction
Gear ratio I
Gear ratio II
Gear ratio III
Gear ratio IV
Gear ratio V
Final reduction
Item English Metric
Drive train
Electrical
Wet, multi-plate type
5-speed, constant mesh
3.166
2.357
1.888
1.555
1.333
1.136
3.769
Gear shift pattern
Ignition
Starting system
Spark plug :
Standard
ECM
Kickstarter
Left foot-operated return
system 1-N-2-3-4-5
NGK R0451B-8
Spark plug gap
0.024 – 0.028 in
(0.6 – 0.7 mm)
2,181 mm
827 mm
1,271 mm
1,489 mm
951 mm
418 mm
322 mm
15.22 cu-in 249.4 cm
3
Torque Specifications
150 Technical Information
Nuts, Bolts, Fasteners
Check and tighten nuts, bolts, and fasteners before every outing.
Engine
Item
1
2
3
4
6
7
8
9
10
11
12
13
14
ENGINE
Cylinder head cover bolts
Exhaust pipe joint nuts
Water pump cover bolts
Crankshaft hole cap
Clutch cover bolts
Coolant drain bolt
Engine oil drain bolt
Cylinder bolt
Oil filter cover bolts
Cylinder head bolts
Drive sprocket bolt
Transmission oil drain bolt
Cylinder head stud bolts
Torque
Remarks
lbf
•
ft N
•
m kgf
•
m
7
15
7
11
9
7
7
12
7
9
7
23
12
33
10
21
10
15
12
10
10
16
10
12
10
31
16
45
1.0
2.1
1.0
1.5
1.2
1.0
1.0
1.6
1.0
1.2
1.0
3.2
1.6
4.6
NOTE 1
NOTE 2
NOTE 2
NOTE 2
Transmission oil check
bolt
5
1. Apply grease to the threads.
2. Apply oil to the threads.
NOTES:
(11)
(9)
(1)
(13)
(12)
(10)
(14)
(6)
(1)
(2)
(7)
(5)
(4)(8)
(3)
(14)
RIGHT SIDE
LEFT SIDE
Torque Specifications
Technical Information 151
Frame
15 Swingarm pivot nut
65 88 9.0 NOTE 1
NOTE 4
17
16 Fork (fork damper)
(fork cap)
25
22
34
30
3.5
3.1
14 Shock absorber
32 44 4.5 NOTE 1
Item
Torque
Remarks
lbf
•
ft N
•
m kgf
•
m
12 Cylinder head hanger bolts
40 54 5.5
13 Cylinder head hanger
plate bolts
24 33 3.4
Front engine hanger
plate nuts
19 26 2.7
10 Front engine hanger nut
40 54 5.5
8 Rear axle nut
94 128 13.1
7 Front axle pinch bolts
15 20 2.0
6 Front axle nut
65 88 9.0
9 Chain adjuster lock nuts
20 27 2.8
11 Lower engine hanger nut
40 54 5.5
NOTE 2
NOTE 1
5
Handlebar lower holder nuts
32 44 4.5
4 Handlebar upper
holder bolts
16 22 2.2
3 Fork bridge lower pinch
bolts
15 20 2.0
2 Fork bridge upper pinch
bolts
16 22 2.2
1 Steering stem nut
80 108 11.0
FRAME
1. U-nut.
2. UBS nut.
3. Apply molybdenum oil to the threads and flange surface.
4. Alock bolt: replace with a new one
5. Apply locking agent to the threads.
6. SH bolt
NOTES:
19
20
Shock spring lock nut
Kickstarter arm bolt
32
28
44
38
4.5
3.9
18 Rear shock link nuts
(frame side)
39 53 5.4 NOTE 1, 3
22 Brake hose bolts
25 34 3.5
Front brake master
cylinder holder bolts
21
7.3 9.9 1.0
(shock link side:
nut width 19 mm)
Rear shock arm nuts
(swingarm side:
nut width 17 mm)
39 53 5.4 NOTE 1, 3
39 53 5.4 NOTE 1, 3
(3)
(9)
(6)
(7)
(15)
(14)
(16)
(22)
(21)
(19)
(5)
(7)
(11)
(10)
(12)
(13)
(18)
(17)
(17)
(14)
(20)
(9)
(8)
(4)
(1)
(2)
Torque Specifications
152 Technical Information
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
Caliper mounting bolts
Front brake disc nuts
Rear brake disc nuts
Brake pedal pivot bolt
Spoke (front)
(rear)
Rim locks
Subframe bolts (upper)
(Lower-left)
(Lower-right)
Fork center bolt
Fork center lock nut
Disc cover bolts
Fork protector bolts
Muffler clamp bolt
Muffler mounting
Front side
A, B bolts
Rear side
Driven sprocket nuts
Seat mounting bolts
Front brake reservoir
cap screws
Rear brake reservoir
cap bolts
Fork air pressure release
screw
Shroud B bolts
Drive chain roller (upper)
(lower)
Throttle cable lock nut
Steering damper
mounting bolts
Brake lever adjuster lock
nut
Brake pedal adjuster lock
nut
Mud guard screws
Side cover bolts
Fuel pump mounting bolts
22
12
12
27
2.7
2.7
9
24
24
36
51
16
10
5.2
15
19
19
24
19
0.7
0.7
1.0
3.7
9
9
3.0
15
4.4
4.4
0.8
7
8
30
16
16
36
3.7
3.7
12
33
33
49
69
22
13
7
21
26
26
32
26
1.0
1.0
1.3
5
12
12
4
20
5.9
5.9
1.1
10
11
3.1
1.6
1.6
3.7
0.4
0.4
1.2
3.4
3.4
5.0
7.0
2.2
1.3
0.7
2.1
2.7
2.7
3.3
2.7
0.1
0.1
0.1
0.5
1.2
1.2
0.4
2.0
0.6
0.6
0.1
1.0
1.1
NOTE 4
NOTE 1
NOTE 1
NOTE 5
NOTE 4
NOTE 1
NOTE 6
NOTE 1
NOTE 4
Item
Torque
Remarks
lbf
•
ft N
•
m kgf
•
m
FRAME
1. U-nut.
2. UBS nut.
3. Apply molybdenum oil to the threads and flange surface.
4. Alock bolt: replace with a new one
5. Apply locking agent to the threads.
6. SH bolt
NOTES:
Frame
(28)
(30)(31)
(27)
(48)
(37)
(47)
(24)
(43)
(38)
(40)
(45)
(33)
(34)
(26)
(46)
(28)
(25)
(39)
(37)
(35)
(35)(48)
(41)
(42)
(27)
(23)
(44)
(40)
(33)
(36)
(29)
(29) (41)
(49)
(32)
Technical Information 153
Oxygenated Fuels
Some conventional gasolines are being blended
with alcohol or an ether compound. These
gasolines are collectively referred to as
oxygenated fuels. To meet clean air standards,
some areas of the United States and Canada use
oxygenated fuels to help reduce emissions.
If you use an oxygenated fuel, be sure it is
unleaded and meets the minimum octane rating
requirement.
Before using an oxygenated fuel, try to confirm
the fuel’s contents. Some states/provinces
require this information to be posted on the
pump.
The following are the EPA-approved percentages
of oxygenates:
ETHANOL (ethyl or grain alcohol) 10% by
Volume
You may use gasoline containing up to 10%
ethanol by volume. Gasoline containing ethanol
may be marketed under the name “Gasohol”.
MTBE (Methyl Tertiary Butyl Ether) 15% by
Volume
You may use gasoline containing up to 15%
MTBE by volume.
METHANOL (methyl or wood alcohol) 5% by
Volume
You may use gasoline containing methanol
containing up to 15% methanol by volume as
long as it contains cosolvents and corrosion
inhibitors to protect the fuel system. Gasoline
containing more than 5% methanol by volume
may cause starting and/or performance problems.
It may also damage metal, rubber, and plastic
parts of your fuel system.
If you notice any undesirable operating
symptoms, try another service station or switch
to another brand of gasoline.
Fuel system damage or performance problems
resulting from the use of an oxygenated fuel
containing more than the percentages of
oxygenates mentioned above are not covered
under warranty.
Oxygenated fuels can damage paint and plastic.
Be careful not to spill fuel when filling the fuel
tank. Wipe up any spills immediately.
Oxygenated fuels can damage paint and plastic.
NOTICE
154 Technical Information
Competition Logbook
Any serious competition effort relies heavily on
the knowledge gained and compiled from
previous racing events. The best way to organize
the many bits of information is to record them in
a logbook.
Your logbook can include such information as
suspension adjustments, steering damper
adjustments, gearing, and tire selection. This
detailed information, along with your comments,
can prove valuable when you compete at the
same track or on similar terrain.
Your logbook can also tell you when
maintenance was performed and when it will be
necessary again. Your logbook also lets you
record any repairs and lets you keep track of the
running time on the engine and suspension
components.
If you choose to sell your CRF, the accurate
maintenance records in your logbook might be
the deciding deal-maker for a potential buyer.
Consider using different color pens or pencils to
record important information on specific
subjects. For example, record results in black,
steering damper setting in red, suspension/chassis
settings in blue, and gearing selections in green.
Color codes will help you identify the
information you want with a glance.
Tuning & Adjustment Records
Keep track of the settings and adjustments that
worked best at a particular location. These items
include:
• basic track conditions, altitude, and
temperature
• suspension settings
• steering damper settings
• chassis adjustments tested and selected
• gearing
• tire selection
• air pressure
Competition Records
• your placings
• thoughts to improve performance next time:
both yours and your CRF’s
• strategy notes
Maintenance Records
• regular interval maintenance
• repairs
• running time on engine
• running time on suspension components
Timekeeping
This Manual lists maintenance intervals for
every-so-many races or every-so-many hours of
running.
Because all races are not the same, the most
effective way to schedule maintenance is by the
hours you have run your CRF.
An official “guesstimate” is close enough for our
timekeeping purposes. You may choose to record
your time the same way aircraft operators do (but
without the benefit of an electrical hourmeter).
All running time is broken down into hours and
tenths of an hour (each six minutes represents
one tenth of an hour).
Racing Records
Information worth recording for this section of
your logbook may include:
• Your placing in each moto and overall
finishing position.
• Thoughts on what you could do to improve
your performance next time.
• Notes on any patterns noted in choice of
starting gate positions or in riding portions of
the course as the day progressed that may
prove helpful in future events.
• Any places on the course where you chose the
wrong line and were passed too easily.
• Notes on strategy used by your competition or
by riders in another event that are worth
remembering.
Maintenance Records
Regular maintenance items you’ll want to record
in your logbook should include:
• Dates and results of cylinder, piston and ring
examinations
• Patterns for frequency of need for
decarbonization with a particular oil
• When you last performed shock linkage and
swingarm pivot bearing maintenance
• Engine, transmission, and suspension oil
changes
• Chain, sprocket, chain guide and slider
replacements
• Coolant changes and related component
replacements
• Spark plug, brake pad and control cable
replacements
In addition, you should record any irregularities
noted in component wear so you’ll remember to
keep a close eye on these areas in the future.
Technical Information 155
Competition Logbook
Date Running Location/Event Comments (Suspension Settings, Steering Damper Settings, Gearing, Chassis Adjustments,
Time Maintenance Performed, etc.)
(Make several photocopies of this page for future use)
Driven chain
size/link
DID520DMA4–120RB
RK520TXZ-120RJ
Optional
Handlebar
lower holder
Standard 3 mm offset
no offset
FRAME Remarks
Driven sprocket
Standard
< >: Drive chain links
49 Teeth, Aluminum.
<116>
Optional 48 Teeth, Aluminum
50 Teeth, Aluminum
TOOLS Remarks
Pin spanner A
Air gauge For checking tire air pressure
Workstand
To adjust spring preload.
(two spanners required)
For maintenance
These parts and tools may be ordered from your
authorized dealer.
FRAME Remarks
Shock spring
Standard
Optional
Softer
Stiffer
Fork spring
Standard
The standard fork spring and shock spring
mounted on the motorcycle when it leaves the
factory are not marked. Before replacing the
springs, be sure to mark them so they can be
distinguished from other optional springs.
296.9 lbf/in (52.0 N/mm)
No mark
(factory products)
Red
paint
(aftermarket parts)
or
285.5 lbf/in (50.0 N/mm)
26.20 lbf/in (4.59 N/mm)
Blue
White
307.7 lbf/in (53.9 N/mm)
Red
Stiffer
Optional
Softer
25.12 lbf/in (4.4 N/mm)
27.41 lbf/in (4.8 N/mm)
2 scribe marks
No mark
3 scribe marks
156 Technical Information
Optional Parts List
Technical Information 157
Spare Parts & Equipment
There are numerous spare parts you can take to
an event to help ensure you get in a full day of
riding. In addition to the usual nuts and bolts,
consider the following:
Spare Parts
spark plugs
air cleaner (clean & oiled, sealed in a plastic bag)
chain & masterlinks
chain guide slider
chain guide
chain rollers
inner tubes (front & rear)
fenders
footpegs
fuel feed hose and retainers
fuel pump filter
number plate & side covers
handlebar
grips
levers (brake, clutch)
clutch lever handlebar mount
clutch cable
throttle assembly
throttle cable
shift lever
brake pedal
spokes (front & rear, each side)
sprockets (larger & smaller than standard, for
gearing changes & collision damage
replacement)
assorted nuts, bolts, washers, screws, cotter pins
Additional Spares
fuel pump
front brake master cylinder
rear brake assembly
wheels & tires (front & rear, mounted)
clutch discs and plates
engine & transmission oil
seat
ignition components
radiator hoses
radiator shrouds (L & R)
brake hoses (front & rear)
General Tools
sockets (3/8 in drive)
screwdrivers: blade & Phillips No. 1, 2, 3
wrench, large adjustable
wrenches: open end & box
wrenches: hex (Allen)
wrench, spoke
torque wrench (metric scale, click-stop style)
pliers: standard, needle-nose, channel-lock set
hammer, plastic head
syringe with adjustable stop
tire pressure gauge
tire irons
tire pump or air tank
feeler gauge set
vernier caliper (metric)
pressure/vacuum testing equipment (USA only)
Honda Special Tools
Any special tools for your motorcycle purchased
from your dealer.
• Lock Nut Wrench 07WMA-KZ30100
• Spoke Wrench 07JMA-MR60100
070MA-KZ30100
• Tensioner Stopper 070MG-0010100
07AMG-001A100
(USA only)
• Piston Base 07958-2500001
• Fork Rod Holder 07AMB-KZ3A100
(USA only)
You can purchase a PGM-FI Setting Tool for
your CRF from your dealer.
• PGM-FI Setting Tool 06380-N1D-A00
Chemical Products
Pro Honda GN4 4-stroke Oil
(Engine and Transmission Oil)
SAE80 or 90 gear oil
HP Fork Oil, SS-19
Pro Honda DOT4 Brake Fluid
Pro Honda HP Chain Lube
Pro Honda Foam Filter Oil
Pro Honda Hondabrite
Pro Honda Dielectric Grease
Pro Honda Handgrip Cement
Pro Honda Hondalock
Molybdenum Disulfide grease (containing more
than 3% molybdenum disulfide additive)
Pro Honda White Lithium Grease
Multi-purpose Grease
Rust-inhibiting Oil
Cable lubricant
Pro Honda HP Coolant
Urea based multi-purpose grease designed for
high temperature, high pressure performance
(example: EXCELITE EP2 manufactured by
KYODO YUSHI, Japan or Shell Stamina EP2 or
equivalent).
Other Products
pliers-safety wire
safety wire
mechanic’s wire
duct tape
plastic tie-wraps
hose clamps
drop light
electrical tape
Scotch-Brite Hand Pad #7447 (maroon)
Teflon tape
158 Technical Information
Wiring Diagram
This section contains information about
contacting Honda and how to get an of ficial
Honda Service Manual.
Authorized Manuals .........................................160
Contacting Honda.............................................161
Your Dealer ......................................................162
The Honda Rider’s Club (USA only) ..............163
Consumer Information 159
Consumer Information
The Service Manual used by your authorized dealer is available from your
Honda dealer or Helm, Inc. (USA only, Canada: See your dealer to order
authorized manuals)
Also available but not necessary to service your model is the Honda Common
Service Manual which explains theory of operation and basic service
information for various systems on Honda motorcycles, scooters, ATVs,
MUVs, PWCs.
These Honda manuals are written for the professional technician, but most
mechanically-capable owners should find them helpful if they have the proper
tools and skills. Special Honda tools are necessary for some procedures.
160 Consumer Information
Authorized Manuals
Publication Item No. Description
61KRN53 2013 CRF250R Service Manual
61CM002 Common Service Manual
31KRN690 2013 CRF250R Owner’s Manual
Order On-Line: www.helminc.com
Order Toll Free: 1-888-CYCLE93 (1-888-292-5393)
(NOTE: For Credit Card Orders Only)
Monday - Friday 8:00 AM - 6:00 PM EST
Consumer Information 161
Your owner’s manual was written to cover most
of the questions you might ask about your
Honda. Any questions not answered in the
owner’s manual can be answered by your dealer.
If he doesn’t have the answer right away, he will
get it for you.
If you have a difference of opinion with your
dealer, please remember that each dealership is
independently owned and operated. That’s why
it’s important to work to resolve any dif ferences
at the dealership level.
If you wish to comment on your experiences with
your Honda or with your dealer, please send your
comments to the following address:
Motorcycle Division, American Honda Motor
Co., Inc., P.O. Box 2200, Torrance CA 90509-
2200, mailstop: 100-4C-7B,
telephone: (866) 784-1870.
Canada: Honda Canada Inc., Customer Relations
Dept, 180 Honda Boulevard, Markham, Ontario
L6C 0H9, telephone: (888) 946 – 6329,
facsimile: (877) 939 – 0909.
Please include the following information in your
letter:
• name, address, and telephone number
• product model, year, and VIN
• date of purchase
• dealer name and address
We will likely ask your dealer to respond, or
possibly acknowledge your comments directly.
Contacting Honda
162 Consumer Information
Once you purchase your new Honda, get familiar
with the organization of your dealer so you can
utilize the full range of services available.
The service department is there to perform
regular maintenance and unexpected repairs. It
has the latest available service information from
Honda.
The parts department offers Honda Genuine
Parts, Pro Honda products and Honda Genuine
Accessories (USA only), and Honda accessories
and products (Canada only). The same quality
that went into your Honda can be found in Honda
Genuine replacement parts. You’ll also find
comparable quality in the accessories and
products available from the parts department.
Your dealer can inform you about competition
events in your area, as well as provide you with
information about the Honda Rider’s Club of
America (USA only).
We’re sure you’ll be as pleased with the service
your dealer continues to provide after the sale as
you are with the quality and dependability of
your Honda.
Your Dealer
The Honda Rider’s Club of America (HRCA)
sponsors local riding chapters at Authorized
Honda Dealerships across the country. You can
log on to the HRCA Clubhouse website for more
information at
www.hrca.honda.com.
Consumer Information 163
The Honda Rider’s Club (USA only)
164 Index
accessories...........................................................3
adjustments,
chassis ........................................................136
control freeplay ......................................59, 62
for competition...........................................109
gearing........................................................137
personal fit .................................................139
steering damper ..........................................134
suspension, front ........................................110
suspension, rear..........................................125
suspension, track conditions ......................129
tire selection ...............................................138
after competition maintenance ..........................30
air cleaner ..........................................................56
air pressure,
front suspension .........................................110
tires...............................................................95
apparel, protective ...............................................2
appearance care ...............................................107
authorized manuals..........................................160
basic operation ..................................................15
before riding ......................................................11
between motos & practice maintenance ...........30
brakes,
fluid level .....................................................91
lever, front adjustment .................................90
pad wear .......................................................93
pedal height ..................................................90
break-in guidelines ............................................19
capacity, fuel .....................................................40
care, appearance ..............................................107
chain drive.........................................................97
chassis adjustments .........................................136
cleaner, air .........................................................56
cleaning, appearance care ...............................107
clutch system, adjustment .................................62
competition logbook........................................154
consumer information .....................................159
contacting Honda ............................................161
controls ................................................................5
coolant ...............................................................54
customer service..............................................162
cylinder system..................................................79
damping adjustments,
front ............................................................110
rear..............................................................126
steering damper ..........................................134
dealer, your......................................................162
diagram, wiring ...............................................158
drive chain.........................................................97
engine,
idle speed......................................................61
lacks power ................................................145
number .......................................................148
oil .................................................................49
pinging .........................................................40
starting..........................................................17
stop button....................................................18
stopping........................................................18
won’t start ..................................................145
environment, protecting ..................................144
filter,
air .................................................................56
fuel pump .....................................................44
oil .................................................................50
fork,
front suspension adjustment.......................110
front suspension inspection..........................85
oil recommendation......................................87
front brake lever adjustment .............................90
front suspension maintenance .........................112
fuel,
line................................................................40
line replacement ...........................................41
oxygenated .................................................153
pump filter....................................................44
refueling .......................................................40
system...........................................................40
tank capacity ................................................40
F
E
D
C
B
A
Index
Index 165
Index
gap, spark plug ..................................................67
gasohol ............................................................153
gasoline..............................................................40
gearing.............................................................137
guidelines,
steering damper ..........................................135
suspension adjustment ...............................130
handlebar inspection........................................105
Honda,
contacting ...................................................161
Rider’s Club ...............................................163
service manual............................................160
identification, vehicle......................................148
idle speed, engine ..............................................61
indicator,
MIL blink .......................................................7
circuit inspection ............................................8
DTC index......................................................9
inspection, pre-ride............................................13
instruments ..........................................................5
labels, safety........................................................4
logbook, competition.......................................154
maintenance,
after competition ..........................................30
before & after competition...........................30
between motos & practice............................30
component locations ....................................32
general competition......................................26
importance....................................................22
safety ............................................................23
schedule........................................................24
manual, service................................................160
modifications.......................................................3
oil,
engine ...........................................................49
fork ...............................................................87
transmission .................................................52
operating instructions ........................................15
operation component locations ...........................6
optional,
parts list......................................................156
sprockets.....................................................137
oxygenated fuels..............................................153
pads, brake.........................................................93
parts, optional..................................................156
personal fit adjustments ..................................139
pinging, engine..................................................40
plug, spark .........................................................67
pre-load, rear suspension.................................125
pre-ride inspection.............................................13
protective apparel ................................................2
rear suspension maintenance...........................125
Rider’s Club Honda (USA only).....................163
riding,
apparel............................................................2
basic operation .............................................15
before............................................................11
important safety information..........................2
safety precautions...........................................2
safety,
a few words about .................Safety Messages
important information ....................................2
important precautions.....................................2
labels ..............................................................4
maintenance..................................................23
riding precautions.........................................16
schedule, maintenance.......................................24
seat ....................................................................33
serial numbers .................................................148
service,
customer .....................................................162
manuals ......................................................160
spare parts........................................................157
spark knock .......................................................40
spark plug,
maintenance..................................................67
reading........................................................133
specifications...................................................149
spring pre-load, rear suspension .....................125
starting,
engine ...........................................................17
troubleshooting...........................................145
steering damper,
adjustment..................................................134
guidelines ...................................................135
operation inspection...................................104
steering stem inspection ..................................105
(cont’d)
S
R
P
O
M
L
I
H
G
166 Index
Index
stopping engine .................................................18
storage .............................................................143
subframe ............................................................36
suspension,
front..............................................................85
rear................................................................86
suspension adjustment,
front ............................................................110
rear..............................................................125
for track conditions ....................................129
guidelines ...................................................130
transmission oil .................................................52
tuning tips........................................................133
throttle,
freeplay.........................................................59
inspection .....................................................60
tires,
air pressure ...................................................95
flat ................................................................95
selection......................................................138
tools ...............................................................157
torque specifications
engine .........................................................150
frame ...................................................151-152
transporting......................................................142
troubleshooting................................................145
tubes, replacing .................................................95
valve clearance ..................................................68
vehicle identification no. (VIN) ......................148
washing your motorcycle ................................107
wheels................................................................94
wiring diagram ................................................158
W
V
T
The maintenance schedule (page 25) lists ser vice frequencies for:
each race or about 2.5 hours,
every 3 races or about 7.5 hours,
every 6 races or about 15.0 hours,
every 9 races or about 22.5 hours and
every 12 races or about 30.0 hours
Maintenance
Check the items listed on the Pre-ride inspection checklist each time before you ride
(page 13).
unleaded gasoline, pump octane number of 91 or higher
tank: 1.5 US gal (5.7R)
Pro Honda GN4 4-stroke oil, or an equivalent.
Pro Honda GN4 4-stroke oil, or an equivalent.
Pre-ride Inspection
Fuel tank Capacity
Engine oil
Transmission oil
Record important information here:
VIN
Engine No.
Owner’s:
Name
Address
City/State
Phone
Dealer’s:
Name
Address
City/State
Phone
Service Mgr.
Front: 15 psi (100 kPa, 1.0kgf/cm
2
)
Rear: 15 psi (100 kPa, 1.0kgf/cm
2
)
standard: R0451B-8 (NGK)
DID520DMA4–116RB RK520TXZ–116RJ
Tires
Tire Pressure (cold)
Spark
ethylene glycol antifreeze (silicate-free) for aluminum engines in 50/50 solution with
Pro Honda HP Coolant or equivalent distilled water.
Coolant
Plug
Drive Chain/link
Front
Type bias-ply, tube
80/100 – 21 51M
DUNLOP MX51FA
Rear
100/90 – 19 57M
DUNLOP MX51
Quick Reference
Quick Reference
The following is a brief, but important collection
of information you need to know about your
Honda. You’ll also find space to record
important notes.
How To Avoid Costly Repairs
The engine of your Honda can be the most
expensive component to repair. Proper
maintenance, especially the use of the
recommended fluids and filters, prevents
premature wear and damage.
Frequent causes of costly engine repairs are:
• Transmission oil & engine oil: insufficient
quantity, improper oil.
• Air cleaner: dirty, leaking because of improper
installation (poor seal).
