1998-2004 Honda Foreman 450 factory service manual, Page 467Get this manual
TROUBLESHOOTING
11 Accelerate or run at high speed Engine knokcs Worn piston and cylinder Wrong type of fuel Excessive carbon build-up in combustion chamber Eng ne does not knock Ignition timing too advanced (faulty ignition contro module) Lean fuel mixture
Possible cause
POOR PERFORMANCE AT LOW AND IDLE SPEED
Possible cause
1Check carburetor pilot screwIncorrect adjustment
See section 5
Correct
2Check for leaking intake pipe -
Faulty insulator O-ring Damaged insulator