2004-2005 Honda TRX450R Factory Sevice Manual, Page 200Get this manual
CRANKCASETRANSMISSIONCRANKSHAFTBALANCER
TROUBLESHOOTING
Excessive engine no ise Worn connecting rod big end bearing Worn crankshaft main journal bearing Worn balancer bearing Improper balancer installation Worn transmission gears Worn transmission bearings Tr ansm ission jumps out of gear Worn gear dogs or dog holes Worn shift drum guide roove Wo rn shift fo rk guide pin Worn gear shifter gr oove