Generic XOR 125, Service Manual

Page: 87 / 97

86
ELECTRICAL
Complaint Symptom and possible causes Remedy
No sparking or
poor sparking. 1. Defective CDI & ignition coil unit.
2. Defective spark plug.
3. Defective magneto stator coil.
4. Loose connection of lead wire.
Replace.
Replace.
Replace.
Connect/tighten.
Spark plug
soon becomes
fouled with
carbon.
1
．
Mixture too rich.
2 ． Idling speed set too high.
3 ． Incorrect gasoline.
4
．
Dirty element in air cleaner.
5
．
Spark plug loose.
6
．
Incorrect engine oil.
Adjust carburetor.
Adjust carburetor.
Change.
Clean.
Replace by hot type plug.
Replace.
Spark plug
electrodes
overheat or
burn. 1. Spark plug too hot.
2. The engine overheats.
3. Spark plug loose.
4. Mixture too lean.
5. Not enough engine oil.
Replace by cold type plug,
Tune up.
Retighten.
Adjust carburetor.
Check oil pump.
Magneto does
not charge. 1. Open or short in lead wires, or loose lead
connections.
2.
Shorted, grounded or open magneto coil.
3. Shorted or open regulator/rectifier.
Repair or retighten.
Replace.
Replace.
Magneto
charge, but
charging rate
is below the
specifications. 1. Lead wires tend to get shorted or open-circuited or
loosely connected at terminal.
2. Grounded or open-circuited stator coils of
magneto.
3. Defective
regulator/rectifier.
4. Defective cell plates in the battery,
Repair or retighten.
Replace.
Replace.
Replace the battery.
Magneto
overcharges. 1. Internal short-circuit in the battery.
2. Resistor element in the regulator/rectifier
damaged or defective.
3.
Regulator/rectifier unit poorly grounded.
Replace the battery.
Replace.
Clean and tighten ground
connection.
Unstable
charging. 1. Defective regulator/rectifier.
2. Lead wire insulation frayed due to vibration,
resulting in intermittent shorting.
3.
Magneto coil internally shorted.
Repair or replace.
Replace.
Replace.
Starter button
is not effective.
1. Battery run down.
2. Defective switch contacts.
3. Brushes not seating properly on commutator in
starter motor.
4. Defective starter relay.
5. Defective starter pinion gears
6. Defective front or rear brake light switch circuit.
Recharge and replace.
Replace.
Repair or replace.
Replace.
Replace.
Repair or replace.