2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 311Get this manual
CRANKCASETRANSMISSIONCRANKSHAFTBALANCER ('04'05) Install the special tool onto the crankshaft endTOOL: Threaded adapter 07WMF-KFF0300 or 07AMF-HP1A100 (U.S.Aonly)
THREADED ADAPTOR
Set the special tools onto the crankshaft and left crankshaft bearingTOOLS: Assembly collar Threaded shaft U.S.A.TOOLS: Assembly collar Threaded shaft
Be careful not to bend the connecting rod by letting it press against the crankcase mating surface