Electrical - Suzuki DR 125 Service Manual

7-8 SERVICING INFORMATION

ELECTRICAL

Complaint
No sparking or poor
sparking.
Spark plug is wet or
quickly becomes
fouled with carbon.
Spark plug quickly
becomes fouled with
oil or carbon.
Spark plug electrodes
overheat or burn.
Symptom and possible causes
1. Defective ignition coil.
2. Defective spark plug.
3. Defective generator.
4. Defective CDI unit.
1. Excessively rich air/fuel mixture.
2. Excessively high idling speed.
3. Incorrect gasoline.
4. Dirty air cleaner element.
5. Incorrect spark plug (cold type).
1. Worn piston ring.
2. Worn piston.
3. Worn cylinder.
4. Excessive valve-stem-to-valve-guide clearance.
5. Worn valve stem oil seal.
1. Incorrect spark plug (hot type).
2. Overheated engine.
3. Loose spark plug.
4. Excessively lean air/fuel mixture.
Remedy
Replace.
Replace.
Replace.
Replace.
Adjust carburetor.
Adjust carburetor.
Change.
Clean or replace.
Change to standard spark
plug.
Replace.
Replace.
Replace.
Replace.
Replace.
Change to cold type spark
plug.
Turn-up.
Tighten.
Adjust carburetor.