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General Competition Maintenance
Servicing Your Honda 31
Handgrips
Always use Pro Honda Handgrip Cement or equivalent 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 “ǻ” mark
on the left handlebar grip with the paint mark on the
handlebar.
Refer to the Honda Service Manual (page 168) for installation
instructions.
Fuel Filter
Periodically drain the fuel from the fuel tank, remove and clean
the fuel valve and fuel filter. Replace the fuel valve O-ring if
there are any signs of damage or deterioration (page 42).
Cylinder
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
(page 76).
Fuel Contamination
Refer to Fuel System, in your Owner’s Manual (page 41).
Check the fuel lines for deterioration, damage, or leakage.
Replace the fuel lines, if necessary.
Periodically drain the fuel from the fuel tank, remove and
clean the fuel valve and fuel filter. Replace the fuel valve
O-ring if there are any signs of damage or deterioration
(page 42).
Loosen the carburetor drain screw and examine the fuel that
flows out of the float bowl. If you notice anything in the
fuel, such as water or dirt, remove the float bowl and
inspect its contents (page 131).
For maximum efficiency, drain and replace fuel that has
been in the fuel tank for more than a month.
Gaskets
Always use new gaskets when reassembling components.
For added security, you may choose to bind the handgrips 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 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.
Engine Mounting Bolts and Nuts
Make sure the engine mounting bolts and nuts are tightened
to the proper torque specification (page 155). 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 all
electrical connections.
Battery
Electrical accessories use current from the battery – even
when the engine is off.
Limited operation also allows the battery to discharge. If
you have electrical accessories on your CRF – or do not
ride frequently, we recommend that you charge the battery
frequently (see Battery Charging, page 100).
If you do not expect to ride your CRF for at least two
weeks, we recommend you remove the battery – or at least
disconnect the battery cables (negative cable first).
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