2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 563Get this manual
TROUBLESHOOTING
POOR PERFORMANCE AT LOW AND IDLE SPEED
1Spark Test
Perform spark test
Is there weak or intermittent spark?
YESFaulty spark plug Fouled spark plug Loose or disconnected ignition system wires Broken or shorted spark plug wire Faulty ignition coil Faulty CKP sensor
Faulty engine stop switch
Faulty ignition switch faulty peM
NOGO TO STEP 2
2fuel Pump Inspection
Inspect the fuel flow
Is the fuel pump unit normal?
NOFaulty fuel pump unit (page 6-36)