2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 286Get this manual
TROUBLESHOOTING
POOR PERFORMANCE AT HIGH SPEED
1Fuel Une Inspection Disconnect fuel line at carburetorDoes fuel flow freely?
Clogged fuel line Clogged fuel fill cap breather Faulty fuel valve Clogged fuel strainer
- GO TO STEP 2
2Carburetor Inspection
Check carburetor for cloggingIs the carburetor clogged?
- Carburetor not serviced frequently enough
- GO TO STEP 3
3Valve TIming Inspection
Check valve timingIs the valve timing correct?