1999-2004 Honda TRX400EX FourTrax Service Manual, Page 124Get this manual
CLUTCHlGEARSHlFT LINKAGE Remove the gasket and dowel pins
DOWEL-PINS
Remove the O-ring and oil pump driven sprocket from the oil pump
CLUTCH LIFTER ARM
Remove the clutch lifter arm and return spring from the right crankcase coverCheck the lifter arm spindle for wear or damageCheck the return spring for fatigue or damage