2004-2005 Honda TRX450R Factory Sevice Manual, Page 160Get this manual
CYLINDER HEADIVALVE Caref ully set th cam sprocket nt he cam chain so he timing ma rks th sprocket are alig ned ith the index marks on the cams haft ho lderInstall th cam sp rocket nto the cams haft
Make sure 1fl6 tIming marks on the sprocket align WIth the Index marks when pvnch mal'll:on thtJ pImary
Apply locking agent to the spr ocket bolt threads Align the bo lt holes in he spr ocket and cam shaft
flangeInstall the sprocket bolts, being ca reful not to
let them fall nt the crankcaseTighten the sp rocket bolts while holding the crankshaft