Suzuki UY125S User Manual

7-8 SERVICING INFORMATION
ELECTRICAL
Complaint Symptom and possible causes Remedy
No sparking or poor
sparking.
1. Defective ignition coil or CDI unit.
2. Defective spark plug.
3. Defective pick-up coil or startor coil.
4. Open-circuited wiring connections.
Replace.
Replace.
Replace.
Check and repair.
Spark plug soon
become fouled with
carbon.
1. Mixture too rich.
2. Idling speed set too high.
3. Incorrect gasoline.
4. Dirty air cleaner element.
5. Too cold spark plug.
Adjust carburetor.
Adjust carburetor.
Change.
Clean.
Replace with hot type plug.
Spark plug become
fouled too soon.
1. Worn piston rings.
2. Worn piston or cylinder.
3. Excessive clearance of valve stems in valve
guides.
4. Worn stem oil seal.
Replace.
Replace.
Replace.
Replace.
Spark plug elec-
trodes overheat or
burn.
1. Too hot spark plug.
2. Overheated engine.
3. Loose spark plug.
4. Too lean mixture.
Replace with cold type
plug.
Tune up.
Retighten.
Adjust carburetor.
Battery does not
charge.
1. Open or short-circuited lead wires, or loose lead
connections.
2. Short-circuited, grounded or open startor coils.
3. Short-circuited or punctured regulator/rectifier.
Repair or replace or
retighten.
Replace.
Replace.
Battery does
charge, but charg-
ing rate is below the
specification.
1. Lead wires tend to get shorted or open-circuited
or loosely connected at terminals.
2. Grounded or open-circuited stator coils.
3. Defective regulator/rectifier.
4. Defective cell plates in the battery.
Repair or retighten.
Replace.
Replace.
Replace the battery.
Overcharges. 1. Internal short-circuit in the battery.
2. Damaged or defective resistor element in the reg-
ulator/rectifier.
3. Poorly grounded regulator/rectifier.
Replace the battery.
Replace.
Clean and tighten ground
connection.
Unstable charging. 1. Lead wire insulation frayed due to vibration,
resulting in intermittent short-circuiting.
2. Internally short-circuited stator coils.
3. Defective regulator/rectifier.
Repair or replace.
Replace.
Replace.
Starter button is not
effective.
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.
Repair or replace.
Replace.
Repair or replace.
Replace.
Replace.
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Suzuki UY125S Specifications

General

Brand	Suzuki
Model	UY125S
Category	Scooter
Language	English