Troubleshooting - Electrical - Suzuki DR350 Service Manual

ELECTRICAL
Complaint
Symptom and possible causes
Remedy
No sparking or 1. Defective ignition coil.
Replace.
poor sparking .
2.
Defective sprak plug .
Replace.
3 . Defective pick-up coil or COl unit.
Replace .
4.
Defective magneto .
Replace .
Spark plug soon 1. Mixture t oo rich.
Adjust carburetor.
become fouted
2.
Idling s peed set too high . Adjust carburetor.
with carbon .
3.
Incorrect gasoline .
Change.
4 .
Dirty element In air cleaner.
Clean .
5.
Spark plug too cold .
Replalee by hot type plug .
Spark plug
1.
Worn piston rings
Replace.
become fouled
2.
Piston or cylinder worn.
Replace.
too soon.
3.
E){cessive clearance of valve stems In valve guides.
Replace.
4 .
Worn stem oil seals. Replace.
Spark plug alec- 1 .
Spark plug too hoI. Replace by cold type plug .
trodes overheat
2.
The engine overheats. Tune up.
or bum .
3 .
Defec tive pick·up coil or COl unit . Replce.
4 .
Spark plug loose. Retighten .
5.
M ixture too lean. Adjust carbotetor
Bulb doe, not light . 1. Blown bulb. Replace.
2.
Open or short in lead wires. or loose lead connections. Repair. replace or retighten.
3.
Shorted, grounded or open mangeto lighting coil . Replace.