2005-2006 Honda ATV TRX500FE/FM/TM FourTrax Foreman Factory Service Manual, Page 206Get this manual
CRANKCASETRANSMISSIONCRANKSHAFTBALANCER
TROUBLESHOOTING
Excessive engine noise
Worn, seized or chipped transmission gears Worn transmission bearings Worn connecting rod big end bearing Worn crankshaft main journal bearing Worn balancer bearing Improper balancer installation
Transmission jumps out of gear
Worn gear dogs or dog holes Worn shift drum guide groove Worn shift fork guide pin Worn gear shifter groove Worn shift fork Bent shift fork shaft Faulty gearshift linkage (page 10-5)