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Technical Information 143
Optional Parts List
These parts and tools may be ordered from your
authorized dealer.
Fuel flow amount
decrease
Remarks
Leak jet number
#75
#70
#65 (standard)
#60
#55
CARBURETOR
increase
RemarksMUFFLER
Using an optional muffler,
change the carburetor
settings.
See page 118 f
or more
details.
AMA Noise Emission
Regulation
Conformed Muffler
* Your CRF dose not conform to AMA noise emission
regulation for 2012 year.
An optional AMA noise emission regulation conformed
muffler may be available. Contact your dealer.
CARBURETOR
Main jet
(Standard: #140)
Slow jet
(Standard: #38)
Jet Needle
Standard needle: NMQT
Straight diameter: ø2.775 mm
Specific flow
characteristics
at 1/16 to 1/4
throttle
Rich
Lean
Jet needle
number
(1/2 clip
position leaner
than standard
at 1/8 to 3/4
throttle)
NMRS
ø2.765 mm
NMRU
ø2.785 mm
NMRT
ø2.775 mm
Jet needle
number
(standard
series)
NMRR
ø2.755 mm
NMQR
ø2.755 mm
NMQS
ø2.765 mm
NMQU
ø2.785 mm
NMRV
ø2.795 mm
NMQV
ø2.795 mm
MARK
Size
Remarks
#128 – #148 (
in increments of 2 or 3
)
#35 – #42
(
in increments of 2 or 3
)
NMQT
ø2.775 mm
(standard
needle)
Remarks
< >: Drive chain links
49T, Aluminum <120>
50T, steel <120> (standard)
50T, Aluminum <120>
51T, Aluminum <120>
< >: Drive chain links
55T, Aluminum <126>
56T, steel <126> (standard)
56T, Aluminum <126>
57T, Aluminum <126>
DID420DS3:
120 Links (CRF150R)
126 Links (CRF150RB)
Driven
sprocket
Drive
chain
CRF150R
CRF150RB
Standard
DID420DS3: 130 Links
Optional
FRAME
Remarks
For maintenance
Workstand
To adjust spring preload
Pin spanner A
To torque the shock spring lock
nut
Pin spanner B
TOOLS
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