2004-2005 Honda TRX450R Factory Sevice Manual, Page 206Get this manual

2004-2005 Honda TRX450R Factory Sevice Manual, Page 206

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CRANKCASETRANSMISSIONCRANKSHAFTBALANCER Place he left crankcase down, separate the righ crankcase fro the left crankcase
Remove the oil pump shaft, inner and outer rotors fro the left crankcase