Electrical - Suzuki VL125 Service Manual

9-8 SERVICING INFORMATION

ELECTRICAL

Complaint
No sparking or poor
sparking.
Spark plug is wet or
quickly becomes
fouled with carbon.
Spark plug quickly be-
comes fouled with oil
or carbon.
Spark plug electrodes
overheat or burn.
Generator does not
charge.
Generator charges
but charging rate is
below the specifica-
tions.
Generator over-
charges.
Unstable charging.
Starter button does
not work.
Symptom and possible causes
1. Defective ignition coil.
2. Defective spark plug.
3. Defective pick-up coil.
4. Defective ignitor unit.
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).
1. Worn piston ring.
2. Worn piston.
3. Worn cylinder.
4. Excessive valve-stem-to-valve-guide clearance.
5. Worn valve stem oil seal.
1. Incorrect spark plug (hot type).
2. Overheated engine.
3. Loose spark plug.
4. Excessively lean air/fuel mixture.
1. Open or short in lead wires, or loose lead connections.
2. Shorted, grounded, or open generator coil.
3. Shorted or punctured regulator/rectifier.
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 regulator/rectifier.
4. Defective battery cell plates.
1. Internal short-circuit in the battery.
2. Damaged or defective regulator/rectifier.
3. Poorly grounded regulator/rectifier.
1. Lead wire insulation frayed due to vibration, resulting
in intermittent shorting.
2. Internally shorted generator.
3. Defective regulator/rectifier.
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.
5. Defective turn signal/side stand relay.
6. Wiring connections loose or disconnected.
Remedy
Replace.
Replace.
Replace.
Replace.
Adjust carburetor.
Adjust carburetor.
Change.
Clean or replace.
Change to hot type spark
plug.
Replace.
Replace.
Replace.
Replace.
Replace.
Change to cold type spark
plug.
Tune-up.
Tighten.
Adjust carburetor.
Repair, replace, or connect
properly.
Replace.
Replace.
Repair or tighten.
Replace.
Replace.
Replace battery.
Replace battery.
Replace.
Repair, replace, or connect
properly.
Repair or replace.
Replace.
Replace.
Recharge or replace.
Replace.
Repair or replace.
Replace.
Replace.
Tighten or repair.