Suzuki UG110 2021 Service Manual page 176

7-4 SERVICING INFORMATION
CARBURETOR
Complaint
Starting difficulty.
Idling or low-speed
trouble.
Medium- or high-speed
trouble.
Overflow and fuel level
fluctuations.
CHASSIS
Complaint
Steering is heavy.
Handlebars wobbles.
Front wheel wobbles.
Front suspension
too soft.
Front suspension
too stiff.
Front suspension too
noisy.
Rear wheel wobbles.
Symptom and possible causes
1. Clogged fuel pipe.
2. Air leaking from joint between intake pipe and
carburetor.
3. Air leaking from carburetor joint or vacuum hose joint.
4. Defective thermoelement.
1. Clogged or loose pilot jet.
2. Air leaking from carburetor joint, vacuum hose joint, or
intake pipe.
3. Clogged pilot outlet port.
4. Clogged bypass port.
1. Clogged main jet.
2. Clogged needle jet.
3. Improperly set fuel level.
4. Improperly working throttle valve.
5. Clogged fuel filter.
1. Worn or damaged needle valve.
2. Broken needle valve spring.
3. Improperly working float.
4. Foreign matter on the needle valve.
5. Incorrect float chamber fuel level.
Symptom and possible causes
1. Overtightened steering stem nut .
2. Broken steel ball/race in steering stem.
3. Distorted steering stem.
4. Low tire pressure.
1. Loss of balance between right and left front fork legs.
2. Distorted front fork.
3. Distorted front axle or crooked tire.
4. Loose handlebar set bolt or clamp nut.
1. Distorted wheel rim.
2. Worn front wheel bearings.
3. Defective or incorrect tire.
4. Loose front axle nut.
5. Incorrexct front fork oil level.
1. Weak springs.
2. Not enough fork oil.
1. Too viscous fork oil.
2. Too much fork oil.
1. Not enough fork oil.
2. Loose bolts on suspension.
1. Distorted wheel rim.
2. Worn gearbox bearing.
3. Defective or incorrect tire.
4. Loose rear axle nut.
5. Worn engine mounting bushing.
6. Loose engine mounting bolts/nuts.
Remedy
Clean.
Check intake pipe and carbu-
retor for tighteness, and re-
place gasket.
Tighten or replace defective
part.
Replace.
Clean or tighten.
Tighten or replace defective
part.
Clean.
Clean.
Clean.
Clean.
Adjust float height.
Adjust.
Clean or replace.
Replace.
Replace.
Adjust or replace.
Clean or replace with
needle valve seat.
Adjust float height.
Remedy
Adjust.
Replace.
Replace.
Regulate.
Replace.
Replace.
Replace.
Tighten.
Replace.
Replace.
Replace.
Retighten.
Adjust.
Replace.
Replenish.
Replace.
Drain excess oil.
Replenish.
Retighten.
Replace.
Replace.
Replace.
Tighten.
Replace.
Tighten.