2004-2005 Honda TRX450R Factory Sevice Manual, Page 207Get this manual
CRANKCASETRANSMISSIONCRANKSHAFT BA LANCER REED VALVE INSPECTION Check th reed va lv for fatigue or am ageCheck th reed valv stopper fo cracks am age defo rmation Check he seat rubber for et er ioration or dam ageVALVE STOPPER
REED VALVE
SEAT RU BBER
TRANSMISSION
DISASSEMBLY
Separate the crankcase halves (page 1211)Pull out he shift fo rk shaft sRemove the rig ht shift fo rk, center shift fork and shift rum
Rem ove the thrust washerC1 gea r, co ll ar, thrus washer and C5 gear from the co unte rs haft