2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 283Get this manual
TROUBLESHOOTING
ENGINE LACKS POWER
1Drive Train Inspection Raise wheels off the ground and spin by handDoes the wheel spin freey?
_Brake dragging Worn or damaged wheel hub or axle bearing Drive chain too tightGO TO STEP 2
2TIre Pressure Inspection
Check tire pressureAre the tire pressures low?
_Faulty tire valve Punctured tireGO TO STEP 3
3Clutch Inspection
Accelerate rapidly from low to secondDoes the engine speed change accordingly when clutch ;5 engaged?
Clutch slipping Worn clutch discs Warped clutch plates Weak clutch springs Damaged clutch lifter arm Additive in engine oil
- GO TO STEP 5
4Engine Condition Inspection
Accelerate lightlyDoes the engine speed increase?