Suzuki LT-Z400 2003 - Page 274

8-4 SERVICING INFORMATION
Complaint Symptom and possible causes Remedy
Transmission Jumps 1 . Worn gear. Replace.
out of gear. 2.
Worn or distorted gearshift fork. Replace .
3.
Weakened gearshift stopper spring. Replace.
4. Worn gearshift pawl.
Replace.
Engine Idles poorly . 1.
Tappet clearance out of adjustment.
Adjust.
2. Improper valve sealing. Repair or replace.
3. Worn valve guide. Replace.
4. Worn camshaft. Replace.
5. Excessive spark plug gap. Adjust or replace.
6. Defective ignition coil. Replace.
7.
Defective generator. Replace.
B.
Detecti ve CO l unit. Replace.
9.
Incorrect float chamber fuel level. Adjust float height.
10 . Clogged carburetor jet. Clean.
Engine runs poorly In
1.
Weak valve spring. Replace.
high-speed range.
2. Worn camshaft .
Replace.
3.
Insufficient spark plug gap. Regap or replace.
4. Mistimed valves. Adjust.
5.
Ignition not advanced sufficiently due to poorly working Replace COl unit.
timing advance circuit.
6. Defective ignition coil. Replace.
7. Defective generator. Replace.
B.
Defective COl unit. Replace.
9.
Low float chamber luellevel. Adjust float height.
10. Dirty air cleaner element. Clean or replace.
, 1. Clogged luel hose, resulting in inadequate fuel supply Clean and prime.
to carburetor.
Exhaust smoke Is
1.
ExcessIve amount of engine oil. Check level and drain.
dirty or thick . 2. Worn cylinder. Rebore or replace.
3. Worn piston ring. Replace.
4. Worn valve guide. Replace.
5. Scored or scuffed cylinder wall. Replace.
6. Worn valve stem. Replace valve.
7. Defective valve stem oil seal. Replace.
B. Worn oil ring side rail. Replace oil ri ng .
Engi
ne lacks power . 1. Insufficient tappet clearance. Adjust.
2. Weak valve spring. Replace.
3. Mistimed valves.
Adjust.
4. Worn cylinder.
Replace.
5. Worn piston ring.
Replace.
6. Improper valve seating. Repair or replace.
7. Fouled spark plug. Clean or replace.
B.
Incorrect spark plug.
Replace.
9. Clogged carburetor jet.
Clean.
10. Incorrect Iloat chamber fuel level.
Adjust float height.
11 . Dirty air clea ner element.
Clean or replace.
12. Air
leakage from intake pipe. Tighten or replace.
13. Excessive amount
of engine oil.
Check level and drain.