Electrical - Suzuki FL125S Service Manual

7-9 SERVICING INFORMATION

ELECTRICAL

Complaint
No sparking or poor
sparking.
Spark plug soon
becomes fouled
with carbon.
Spark plug
becomes fouled too
soon.
Spark plug elec-
trodes overheat or
burn.
Battery does not
charge.
Battery does
charge, but charg-
ing rate is below the
specification.
Overcharges.
Unstable charging.
Starter button is not
effective
(for FL125SD).
Symptom and possible causes
1. Defective ignition coil or CDI unit.
2. Defective spark plug.
3. Defective pick-up coil or generator coil.
4. Open-circuited wiring connections.
1. Too rich mixture.
2. Idling speed set too high.
3. Incorrect gasoline.
4. Dirty air cleaner element.
5. Too cold spark plug.
1. Worn piston rings.
2. Worn piston or cylinder.
3. Excessive clearance of valve stems in valve
guides.
4. Worn stem oil seal.
1. Too hot spark plug.
2. Overheated engine.
3. Loose spark plug.
4. Too lean mixture.
1. Open or short-circuited lead wires, or loose lead
connections.
2. Short-circuited, grounded or open generator coils.
3. Short-circuited or punctured regulator/rectifier.
1. Lead wires tend to get shorted or open-circuited
or loosely connected at terminals.
2. Grounded or open-circuited generator coils.
3. Defective regulator/rectifier.
4. Defective cell plates in the battery.
1. Internal short-circuit in the battery.
2. Damaged or defective resistor element in the reg-
ulator/rectifier.
3. Poorly grounded regulator/rectifier.
1. Lead wire insulation frayed due to vibration,
resulting in intermittent short-circuiting.
2. Internally short-circuited generator coils.
3. Defective regulator/rectifier.
1. Run down battery.
2. Defective switch contacts.
3. Brushes not seating properly on starter motor
commutator.
4. Defective starter relay.
5. Defective main fuse.
Remedy
Replace.
Replace.
Replace.
Check and repair.
Adjust carburetor.
Adjust carburetor.
Change.
Clean.
Replace with hot type plug.
Replace.
Replace.
Replace.
Replace.
Replace with cold type
plug.
Tune up.
Retighten.
Adjust carburetor.
Repair, replace or
retighten.
Replace.
Replace.
Repair or retighten.
Replace.
Replace.
Replace the battery.
Replace the battery.
Replace.
Clean and tighten ground
connection.
Repair or replace.
Replace.
Replace.
Repair or replace.
Replace.
Repair or replace.
Replace.
Replace.