2007-2009 Honda TRX300EX TRX300X service manual, Page 200Get this manual
CRANKCASETRANSMISSIONCRANKSHAFT
TROUBLESHOOTING
Excessive engine noise Worn connecting rod big end bearing Worn crankshaft main journal bearing Worn balancer bearing Improper balancer installation Worn transmission gears Worn transmission bearings Transmission jumps out of gear Worn or broken gearshift spindle return spring 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 10-4) Hard to shift Incorrect clutch adjustment Bent or damaged gearshift spindle Bent shift fork Bent shift fork shaft Bent shift fork claw Damaged shift drum guide grooves Damaged shift fork guide pin Faulty gearshift linkage (page 10-4) Gearshift pedal will not return Weak or broken gearshift spindle return spring Bent gearshift spindle Engine vibration Excessive crankshaft runout Improper balancer timing