2008-2010 Kawasaki KFX450R Factory Service Manual, Page 485Get this manual
APPENDIX 17-27 Troubleshooting Guide
Other noise: Bracket, nut, bolt, etcmounted or tightened not properly Rim warped, or not balanced Wheel bearing worn Handlebar holder bolt loose Steering stem nut loose Rear axle runout excessive Engine mounting bolt loose Handlebar pulls to one side: Frame bent Wheel misalignment Swingarm bent or twisted Swingarm pivot shaft runout excessive Steering maladjusted Shock absorption unsatisfactory: (Too hard) Shock absorber adjustment too hard Tire air pressure too high Tire air pressure too low Shock absorber adjustment too soft Shock absorber oil leaking
Oil Pressure Warning Light Goes On:
Engine oil pump damaged Engine oil screen clogged Engine oil filter clogged Engine oil level too low Engine oil viscosity too low Camshaft bearing worn Crankshaft bearing worn Oil pressure switch damaged Wiring faulty Relief valve stuck open O-ring at the oil passage in the crankcase damaged
Exhaust Smokes Excessively:
White smoke: Piston oil ring worn Cylinder worn Valve oil seal damaged Valve guide worn Engine oil level too high Black smoke: Air cleaner clogged Brown smoke: Air cleaner duct loose Air cleaner O-ring damaged Air cleaner poorly sealed or missing