2006 Honda TRX680 Rincon Factory Service Manual, Page 564Get this manual
TROUBLESHOOTING
POOR PERFORMANCE AT HIGH SPEED
1Fuel Pump Inspection Inspect the fuel flowIs the fuel pump unit operation normal? NO YESFaulty fuel pump unit (page 6-36)GO TO STEP 2
2PGM-FI System Inspection Check the PGM-FI systemte the PGM-FI system normal? NO YESFaulty PGM-FI system (page 6-13)GO TO STEP 3
3Ignition Timing Inspection Check ignition timingte the ignition timing correct? NO YESFaulty PCM Faulty CKP sensorGO TO STEP 44Valve Timing Inspection Check valve timingte the valve timing correct? NO YESCamshaft not installed properlyGO TO STEP 5