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SERVICING INFORMATION 7-4
CARBURETOR
Complaint
Symptom and possible causes
Remedy
Trouble with starting.
1. Clogged starter jet.
Clean.
2. Clogged starter pipe.
Clean.
3. Air leaking from a joint between starter body and
Check starter body and
carburetor.
carburetor for tightness,
adjust and replace
gasket.
4. Air leaking from carburetor's joint or vacuum
Check and adjust.
gauge joint.
5. Not operation properly starter plunger.
Check and adjust.
Idling or low-speed
1. Clogged or loose pilot jet, pilot air jet.
Check and clean.
trouble.
2. Air leaking from carburetor's joint, vacuum hose
Check and adjust.
joint, or starter.
3. Clogged pilot outlet or bypass.
Check and clean.
4. Not fully closed starter plunger.
Check and adjust.
Medium-or high
1. Clogged main jet or main air jet.
Check and clean.
speed trouble.
2. Clogged needle jet.
Check and clean.
3. Not operating properly throttle valve.
Check throttle valve
for operation.
4. Clogged fuel filter.
Check and clean.
Overflow and fuel
1. Worn or damaged needle valve.
Replace.
level fluctuations.
2. Broken spring in needle valve.
Replace.
3. Not working properly float.
Check and adjust.
4. Foreign matter has adhered to needle valve.
Clean.
5. Too high or low fuel level.
Adjust float height.
CHASSIS
Complaint
Symptom and possible causes
Remedy
Heavy steering.
1. Overtightened steering stem nut.
Adjust.
2. Broken bearing in steering stem.
Replace.
3. Distorted steering stem.
Replace.
4. Not enough pressure in tires.
Adjust.
Wobbly handlebars.
1. Loss of balance between right and left front forks.
Replace.
2. Distorted front fork.
Repair or replace.
3. Distorted front axle or crooked tire.
Replace.
Wobby front wheel.
1. Distorted wheel rim.
Replace.
2. Worn front wheel bearings.
Replace.
3. Defective or incorrect tire.
Replace.
4. Loose axle or axle holder nuts.
Retighten.
5. Incorrect front fork oil level.
Adjust.
Front suspension
1. Weakened springs.
Replace.
too soft.
2. Not enough fork oil.
Replenish.
Front suspension
1. Too viscous fork oil.
Replace.
too stiff.
2. Too much fork oil.
Drain excess oil.
Noisy front
1. Not enough fork oil.
Replenish.
suspension.
2. Loose bolts and nuts on suspension.
Retighten.
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