Suzuki Vinson LT-A500F - Page 289

9-4 SERVICING INFORMATION
Complaint
Symptom and possible causes
Remedy
Slipping clutch.
1. Worn or damaged clutch shoes.
2. Weakened clutch shoe springs.
3. Worn clutch housing.
4. Worn or slipping drive belt.
Replace.
Replace.
Replace.
Replace.
Engine idles poorly.
1. Valve clearance out of adjustment.
2. Improper valve seating.
3. Defective valve guide.
4. Worn rocker arm or rocker arm shaft.
5. Excessive spark plug gap.
6. Defective ignition coil.
7. Defective CDI unit.
8. Defective generator.
9. Incorrect float chamber fuel level.
10. Clogged carburetor jet.
11. Defective fuel valve.
12. Improperly set pilot screw.
Adjust.
Replace.
Replace.
Replace.
Adjust or replace.
Replace.
Replace.
Replace.
Adjust float height.
Clean.
Replace.
Adjust.
Engine runs poorly in
high-speed range.
1. Weak valve spring.
2. Worn camshaft.
3. Insufficient spark plug gap.
4. Mistimed valves.
5. Defective ignition coil.
6. Low float chamber fuel level.
7. Dirty air cleaner element.
8. Clogged fuel hose, resulting in inadequate fuel supply
to carburetor.
9. Defective fuel valve.
Replace.
Replace.
Regap or replace.
Adjust.
Replace.
Adjust float height.
Clean or replace.
Clean and prime.
Replace.
Exhaust smoke is
dirty or thick.
1. Excessive amount of engine oil.
2. Worn piston ring.
3. Worn valve guide.
4. Scored or scuffed cylinder wall.
5. Worn valve stem.
6. Defective valve stem oil seal.
Check level and drain.
Replace.
Replace.
Replace.
Replace valve.
Replace.
Engine lacks power. 1. Insufficient valve clearance.
2. Weak valve spring.
3. Mistimed valves.
4. Worn cylinder.
5. Worn piston ring.
6. Improper valve seating
7. Fouled spark plug.
8. Incorrect spark plug gap.
9. Clogged carburetor jet.
10. Incorrect float chamber fuel level.
11. Dirty air cleaner element.
12. Worn rocker arm or shaft.
13. Air leakage from intake pipe.
14. Excessive amount of engine oil.
Adjust.
Replace.
Adjust.
Replace.
Replace.
Repair.
Clean or replace.
Adjust or replace.
Clean.
Adjust float height.
Clean or replace.
Replace.
Tighten or replace.
Check level and drain.
Engine overheats.
1. Carbon build-up on piston crown.
2. Insufficient amount of engine oil.
3. Defective oil pump.
4. Clogged oil circuit.
5. Float chamber fuel level too low.
6. Air leakage from intake pipe.
7. Incorrect engine oil.
Clean.
Check level and add.
Replace.
Clean.
Adjust float height.
Tighten or replace.
Change.