1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 354Get this manual
TROUBLESHOOTING
POOR PERFORMANCE AT HIGH SPEEDS
Probable Cause
1Disconnect fuel tube at carburetor FUEL FLOWS FREELY Ch ec Ignition timing an valve clearance CORRECT 3Remove carburetor and check for clogged jet NOT CLOGGED 4FUEL FLOW RESTRICTED Clogged fuel line Clogged fuel fill cap breather hole Clogged fuel valve
INCORRECT CLOGGED
Improper valve clearance Faulty ignition control module (lCM) Faulty ignition pulse generator Improper flywheel installation jets
valve timing
INCORRECT Cam sprocket not installed properly