2000-2003 Honda TRX350 Rancher factory service manual, Page 373Get this manual
TROUBLESHOOTING From previous page Possible cause 10Remove cylinder head cover and inspect lubrication Valve train not lubricated properly Clogged oil passage Clogged oil orifice
Valve train lubricated praperly
11Accelerate or run at high speed
Engine knocks
Engine does not knock
Worn piston and cylinder Use of poor quality fuel Excessive carbon build-up in combustion chamber Ignition timing too advance (Faulty ICM) Lean fuel mixture
POOR PERFORMANCE AT LOW AND IDLE SPEED
Possible cause 1Check carburetor pilot screw adjustment Correct Incorrect See section 5
2Check for leaking carburetor insulator No leak