Electrical System - APRILIA RS 250 Service And Repair Manual

ELECTRICAL SYSTEM

Complaint
Spark plugs soon
becomes fouled
with carbon
Spark plugs become
fouled too soon
Spark plug electrodes
overheat or burn
Generator does
not charge
Generator charges,
but charging rate is
below the
specification
Generator
overcharges
Unstable charging
Symptom and possible causes
1. Mixture too rich.
2. Idling speed set too high.
3. Incorrect gasoline.
4. Clogged air cleaner element.
5. Spark plugs type too cold.
1. Worn piston rings.
2. Piston or cylinder worn.
1. Spark plug too hot.
2. The engine overheats.
3. Spark plug loose.
4. Mixture too lean.
1. Open or short in lead wires, or loose lead
connections.
2. Shorted, grounded or open generator coils.
3. Shorted or defective regulator/rectifier.
1. Lead wires tend to get shorted or open-circuited or
loosely connected at terminals.
2. Grounded or open-circuited stator coils of generator.
3. Defective regulator/rectifier.
4. Defective battery.
1. Internal short-circuit in the battery.
2. Regulator/rectifier damaged or defective.
3. Regulator/rectifier poorly grounded.
1. Lead wire insulation frayed due to vibration, resulting
in intermittent shorting.
2. Generator internally shorted.
3. Defective regulator/rectifier.
SERVICING INFORMATIONM8 - 10
Remedy
Adjust carburettor.
Adjust carburettor.
Change the gasoline.
Clean.
Replace by hot type
plug.
Replace.
Replace.
Replace by cold type
plug.
Turn up.
Retighten.
Adjust carburettors.
Repair or replace or
retighten.
Replace.
Replace.
Repair or retighten.
Replace.
Replace.
Replace.
Replace the battery.
Replace.
Clean and tighten
ground connection.
Repair or replace.
Replace.
Replace.