2015 Kawasaki KX250F Owners Manual - Page 181

180 TROUBLESHOOTING GUIDE head warped • Cylinder gasket damaged • Cylinder • Decompression trouble Poor low-speed performance plug dirty, broken, or gap improperly ad• Spark justed plug cap or high-tension wiring defective • Spark Spark plug shorted or not contacting properly • Spark plug cap incorrect • Crankshaft type sensor • ECU defective defective • Ignition coil defective • Flywheel magneto defective • Wiring connector not in good contact • cleaner element clogged, poorly sealed, or not • Air installed tank cap air vent obstructed • Fuel Throttle body assy holder loose • Air cleaner duct loose • Fuel pump defective • plug loose • Spark Cylinder insufficiently tightened • Cylinder head bolt loose • Cylinder or piston worn • No valve clearance • Valve spring broken or weak • Compression low: Fuel/air mixture incorrect: Spark weak: not seating properly (valve bent, worn, or • Valve carbon accumulation on the seating surface) ring worn, weak, broken, or sticking • Piston Piston ring side clearance excessive • Cylinder gasket damaged • Cylinder head head warped • Cylinder gasket • Decompression damaged trouble • defective • ECU Brake • Clutch dragging • Engineslipping overheating • Engine oil level too high • Engine oil viscosity • Drive chain trouble too high • Poor or no high-speed performance Other: j Firing incorrect: Spark plug dirty, broken, or gap improperly adjusted Spark plug cap or high-tension wiring defective Spark plug cap shorted or not contacting properly Spark plug type incorrect ECU defective Ignition coil defective Crankshaft sensor defective Flywheel magneto defective Wiring connector not in good contact