Suzuki GSX1200 1999, Service Manual

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SERVICING INFORMATION 7-5
Complaint Symptom and possible causes Remedy
Engine overheats. 1. Carbon build-up on piston crown. Clean.
2. Insufficient amount of engine oil. Check level and add.
3. Defective oil pump. Replace.
4. Clogged oil circuit. Clean.
5. Float chamber fuel level too low. Adjust float height.
6. Air leakage from intake pipe. Tighten or replace.
7. Incorrect engine oil. Change.
CARBURETOR
Complaint Symptom and possible causes Remedy
Starting difficulty. 1. Clogged starter jet. Clean.
2. Clogged starter jet passage. Clean.
3. Air leaking from joint between starter body and Tighten, adjust or
carburetor. replace gasket.
4. Air leaking from carburetor joint or vacuum Tighten or replace
hose joint. defective part.
5. Improperly working starter (enricher) plunger. Adjust.
Idling or low-speed 1. Clogged or loose pilot jet. Clean or tighten.
trouble. 2. Clogged or loose pilot air jet. Clean or tighten.
3. Air leaking from carburetor joint, vacuum pipe Tighten or replace
joint, or starter. defective part.
4. Clogged pilot outlet port. Clean.
5. Clogged bypass port. Clean.
6. Starter (enricher) plunger not fully closed. Adjust.
Medium-or high- 1. Clogged main jet. Clean.
speed trouble. 2. Clogged main air jet. Clean.
3. Clogged needle jet. Clean.
4. Improperly working throttle valve. Adjust.
5. Clogged fuel filter. Clean or replace.
6. Not operating properly fuel pump. Check fuel pump for
operation or replace.
Overflow and fuel 1. Worn or damaged needle valve. Replace.
level fluctuations. 2. Broken needle valve spring. Replace.
3. Improperly working float. Adjuster or replace.
4. Foreign matter on the needle valve. Clean or replace with
needle valve seat.
5. Incorrect float chamber fuel level. Adjust float height.