2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 225Get this manual
CYLINDER HEADVALVE Carefully set the cam sprocket onto the cam chain so the timing marks on the sprocket are aligned with the index marks on the camshaft holderInstall the cam sprocket onto the camshaft
Make sure the timing marks on the sprocket align with the index marks when the punch mark on the primary drive gear is aligned with the index mark
Apply locking agent to the sprocket bolt threadsAlign the bolt holes in the sprocket and camshaft flangeInstall the sprocket bolts, being careful not to let them fall into the crankcaseTighten the sprocket bolts while holding the camshaft with the special toolTOOL: Cam sprocket holder 07AMB-MEBA100 (U.S.A only)