1987-2004 Kawasaki Mojave KSF250 Service Manual, Page 200Get this manual
Abnormal Engine Noise Knocking
Exhaust Smokes Excessively
White smoke
CDI unit trouble Carbon built up in combustion chamber Fuel poor quality or incorrect Incorrect spark plug heat range Overheating
Piston slap
Piston oil ring worn Cylinder worn Valve stem oil seal damaged Valve guide worn Engine oil level too high
Black smoke
Cylinderpiston clearance excessive Cylinder, piston worn Connecting rod bent Piston pin, piston holes worn
Valve noise
Air cleaner clogged Main jet too large or fallen off Starter plunger stuck open Fuel level too high
Brown smoke
Valve clearance incorrect Valve spring broken or weak Camshaft bearing worn
Other noise