Suzuki GSF650S User Manual

7-8 SERVICING INFORMATION
ELECTRICAL
Complaint Symptom and possible causes Remedy
No sparking or poor
sparking.
1. Defective ignition coil.
2. Defective spark plug.
3. Defective signal generator.
4. Defective ignitor.
Replace.
Replace.
Replace.
Replace.
Spark plug is wet or
quickly becomes
fouled with carbon.
1. Excessively rich air/fuel mixture.
2. Excessively high idling speed.
3. Incorrect gasoline.
4. Dirty air cleaner element.
5. Incorrect spark plug (cold type).
Adjust carburetor.
Adjust carburetor.
Change.
Clean or replace.
Change to hot type spark plug.
Spark plug quickly
becomes fouled with
oil or carbon.
1. Worn piston ring.
2. Worn piston.
3. Worn cylinder.
4. Excessive valve-stem to valve-guide clearance.
5. Worn valve stem oil seal.
Replace.
Replace.
Rebore or replace.
Replace.
Replace.
Spark plug electrodes
overheat or burn.
1. Incorrect spark plug (hot type).
2. Overheated engine.
3. Loose spark plug.
4. Excessively lean air/fuel mixture.
Change to cold type spark
plug.
Tune-up.
Tighten.
Adjust carburetor.
Generator does not
charge.
1. Open or short in lead wires, or loose lead connections.
2. Shorted, grounded or open generator coil.
3. Shorted or punctured IC regulator or rectifier.
Repair, replace or connect
properly.
Replace.
Replace.
Generator charges
but charging rate is
below the specifica-
tions.
1. Lead wires tend to get shorted or open-circuited or
loosely connected at terminal.
2. Grounded or open-circuited stator coils or generator.
3. Defective IC regulator or rectifier.
4. Defective battery cell plates.
Repair or tighten.
Replace.
Replace.
Replace battery.
Generator over-
charges.
1. Internal short-circuit in the battery.
2. Damaged or defective IC regulator or rectifier.
3. Poorly grounded IC regulator.
Replace battery.
Replace.
Clean and tighten ground con-
nection.
Unstable charging. 1. Lead wire insulation frayed due to vibration, resulting in
intermittent shorting.
2. Internally shorted generator.
3. Defective IC regulator or rectifier.
Repair or replace.
Replace.
Replace.
Starter button does
not work.
1. Run down battery.
2. Defective switch contact.
3. Brushes do not seat properly on the commutator in the
starter motor.
4. Defective starter relay/starter interlock switch.
Recharge or replace.
Replace.
Repair or replace.
Replace.

Suzuki GSF650S Specifications

General

Brand	Suzuki
Model	GSF650S
Category	Motorcycle
Language	English