2006 Arctic Cat DVX 400 Service Manual, Page 161Get this manual
Electrical Problem: Spark absent or weak Condition 1Ignition coil defective
2Spark plug defective 3Magneto defective 4CDI unit defective 5Pick-up coil defective
Remedy 1Replace ignition coil
2Replace plug 3Replace magneto 4Replace CDI unit 5Replace pick-up coil
Problem: Spark plug fouled with carbon Condition 1Mixture too rich
2Idling RPM too high 3Gasoline incorrect 4Air cleaner element dirty 5Spark plug incorrect (too cold) 6Valve seals crackedmissing 7Oil rings wornbroken Problem: Spark plug electrodes overheat or burn Condition 1Spark plug incorrect (too hot) 2Engine overheats 3Spark plug loose 4Mixture too lean Problem: Magneto does not charge Condition 1Lead wiresconnections shortedlooseopen 2Magneto coils shortedgroundedopen 3Regulatorrectifier shortedpunctured
Remedy 1Adjust carburetor
2Adjust carburetor 3Change to correct gasoline 4Clean element 5Replace plug 6Replace seals 7Replace rings
Remedy 1Replace plug