2011 Kawasaki KX250F Owners Manual - Page 167

TROUBLESHOOTING GUIDE 165 quality poor or type incorrect • Fuel Spark type incorrect • Engineplug overheating • ECU defective • Abnormal drive train noise - Piston slap: Piston clearance excessive Cylinder or piston worn Connecting rod bent Piston pin or piston pin holes worn Clutch noise: Clutch housing/friction plate clearance excessive Clutch housing gear excessive Metal chip jammed in clutch housing gear teeth Transmission noise: Crankcase bearing worn or damaged Transmission gear worn or chipped Metal chip jammed in gear teeth Engine oil level or viscosity too low Kick ratchet gear not properly disengaging from kick gear Kick shaft idle gear worn or chipped clearance incorrect • Valve Valve spring broken or weak • Camshaft or cam face worn • Valve lifterbearing worn • Valve noise: Other noise: Connecting rod small end clearance excessive Connecting rod big end clearance excessive Piston ring worn, broken or stuck Piston seized or damaged Cylinder head gasket leaking Exhaust pipe leaking at cylinder head Crankshaft runout excessive Engine mounts loose Crankshaft bearing worn Primary gear worn or chipped Camshaft chain tensioner defective Camshaft chain, sprocket, chain guide worn Decompression spring broken Flywheel magneto loose Drive chain noise: Drive chain slack improperly adjusted Drive chain worn Rear and/or engine sprocket(s) worn Drive chain inefficiently lubricated Rear wheel misaligned Frame noise abnormal Front fork noise: Oil level or viscosity too low Spring broken or weak Front fork air pressure high • Shock absorber damaged Rear shock absorber noise: