2005-2009 Honda TRX400EX/TRX400X Service Manual, Page 188Get this manual
CRANKCASEITRANSMISSIONCRANKSHAFT
TROUBLESHOOTING
Excessive engine noise Worn connecting rod big end beari ng Worn crankshaft main journal bearing Worn balancer beari ng Improper ba lance inst all ation Worn transm ission gears Worn transmission bearings Transmission jumps out of gear Worn or broken gea rshift spind le ret rn spring Worn gea dogs dog ho les Worn shift rum guide groove Worn shift fork guide pin Worn gear shifter groove Worn shift fork Bent sh ift fork shaft Fa ul ty gearshift linkage (page 10-4) Hard to shift Incorrect clutch adjustment Bent or damaged gearsh ift spindle Bent shift fork Bent shift fork shaft Bent shift fork claw Damaged sh ift drum guide grooves Damaged shift fork guide pin Faulty gearshift linkage (page 10-4) Gearshift pedal will not return Weak or broken gearshift spind le return spring Bent gearshift sp indle Engine vibration Excessive crankshaft runout Improper balancer timing