HYOSUNG GF125 Service Manual page 162

ELECTRICAL
Complaint
No sparking or poor
1. Defective ignition coil.
sparking.
2. Defective spark plug.
3. Defective pick up coil.
4. Defective CDI unit.
Spark plug soon
1. Mixture to rich.
become fouled
2. Idling speed set too high.
with carbon.
3. Incorrect gasoline.
4. Dirty element in air cleaner.
5. Spark plug too cold.
1. Worn piston rings.
Spark plug
become fouled
2. Pistons or cylinder worn.
too soon.
3. Excessive clearance of valve stems in valve guides.
4. Worn stem oil seals.
1. Spark plug too hot.
Spark plug
electordes
2. The engine overheats.
overheat or burn.
3. Spark plug loose.
4. Mixture too lean.
1. Open or short in lead wires, or loose lead connections.
Generator does
not charge.
2. Shorted, grounded or open generator coils.
3. Shorted or panctured regulator/rectifier.
1. Lead wires tend to get shorted or open-circuited or loosely
Generator charge,
but charging rate
is below the
2. Grounded or open-circuited stator coils of generator.
specification.
3. Defective regulator/rectifier.
4. Not enough electrolyte in the battery.
5. Defective cell plates in the battery.
1. Internal short-circuit in the battery.
Generator
overcharges.
2. Resistor element in the regulator/rectifier damaged or defective.
3. Regulator/rectifier poorly grounded.
Unstable charging.
1. Lead wire insulation frayed due to vibration, resulting in
2. Generator internally shorted.
3. Defective regulator/rectufier.
Starter button is 1. battery run down.
2. Defective switch contacts.
not effective.
3. Brushes not seating properly on commutator in starter motor.
4. Defective starter relay.
Symptom and possible causes
connected at terminals.
intermittent shorting.
SERVICING INFORMA TION 7-4
Remedy
Replace.
Replace.
Replace.
Replace.
Adjust carburetor.
Adjust carburetor.
Change.
Clean.
Replace by hot type plug.
Replace.
Replace.
Replace.
Replace.
Replace by cold type plug.
Tune up.
Retighten.
Adjust carburetor.
Repair, replace or retighten.
Replace.
Replace.
Repair or retighten.
Replace.
Replace.
Add distilled water between
the level lines.
Replace the battery.
Replace the battery.
Replace.
Clean and tighten ground connection.
Repair or replace.
Replace.
Replace.
Recharge or replace.
Replace.
Repair or replace.
Replace.