2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 337Get this manual
CRANKCASETRANSMISSIONCRANKSHAFTBALANCER (After '05) LEFT CRANKCASE BEARING REPLACEMENT Remove the crankshaft oil sealRemove the set plate bolts, washers and set plates from the left crankcaseDrive the crankshaft bearing out of the left crankcase
BOLTSWASHERS Remove the countershaft and balancer shaft oil -, COUNTERSHAFT