2006-2009 Honda TRX250EX/TRX250X Service Manual, Page 367Get this manual
TROUBLESHOOTING
POOR PERFORMANCE AT HIGH SPEED
1Fuel Flow Inspection Disconnect the fuel hose at carbu retor and check fuel flowDoes fuel flow freely?
Clogged fuel hose Restricted fuel tank breather hose Faulty fuel valve Clogged fuel st rainer
- GO TO STEP 2
2Ca rbureto Inspection
Check the carbure tor fo clogging
Are the carburetor passages clear?
NOCarburetor not serviced frequen tly enough
- GO TO STEP 3
3Valve Timing Inspection
Check the valve timing