2008-2010 Kawasaki KFX450R Factory Service Manual, Page 483Get this manual
APPENDIX 17-25 Troubleshooting Guide
Cylinder head warped Cylinder head gasket damaged Valve spring broken or weak Valve not seating properly (valve bent, worn, or carbon accumulation on the seating surface) Other: IC igniter in ECU trouble Throttle body assy not synchronizing Engine oil viscosity too high Drive train trouble Brake dragging Engine overheating Clutch slipping Spark plug incorrect IC igniter in ECU trouble Crankshaft sensor trouble Miscellaneous: Throttle valve won't fully open Brake dragging Clutch slipping Engine overheating Engine oil level too high Engine oil viscosity too high Drive train trouble
Overheating: