Suzuki EN125-2A Service Manual page 156

Complaint
Spark plug become
fouled too soon.
Spark plug electordes
overheat or burn.
Generator does not
charge.
Generator charges,but
charging rate is below
the specification.
Generator overcharges.
Unstable charging.
Starter button is not
effective.
BATTERY
Complaint
"Sulfation", acidic white
powdery substance or
spots on surfaces of cell
plates.
Symptom and possible causes
1.Worn piston rings.
2.Pistons or cylinder worn.
3.Excessive clearance of valve stems in valve guides.
4.Worn stem oil seals.
1.Spark plug too hot.
2.The engine overheats.
3.Defective pick up coil or ignitor unit.
4.Spark plug loose.
5.Mixture too lean.
1.Open or short in lead wires, or loose lead connections.
2.Shorted, grounded or open generator coils.
3.Shorted or panctured regulator/rectifler.
1.Lead wires tend to get shorted or open-circuited
at terminals.
2.Grounded or open-circuited stator coils of generator.
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.
2.Resistor element in the regulator/rectifier damaged or defective.
3.Regulator/rectifier poorly grounded.
1.Lead wire insulation frayed due to vibration,
shorting.
2.Generator internally shorted.
3.Defective regulator/rectifier.
1.Batttery run down.
2.Defective switch contacts.
3.Brusnes not seating properly on commutator in starter motor.
4.Defective starter relay.
Symptom and possible causes
1. Not enough electrolyte.
2.Battery caes is cracked.
3.Battery has been left in a run-down
a long time.
4.Contaminated electrolyte (Foreign matter
enters the battery and become mixed
electrolyte.)
S E R V I C I N G I N F O R M AT I O N
or loosely connected
resulting in intermittent
Add distilled water, if the battery has not been damaged
and "sulfation" has not advanced too far, and recharge.
Replace the battery.
condition for Replace the battery.
has If "sulfation" has not advanced too far, try to restore the
with the battery by replacing the electrolyte, recharging it fully
with the battery detached from the motorcycle and then
adjusting electrolyte S.G.
7 - 4
Remedy
Replace.
Replace.
Replace.
Replace.
Replace by cold type plug.
Tune up.
Adjust.
Retighten.
Adjust carburetor.
Repair or 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.
Remedy