1997-2001 Honda TRX250 Fourtrax Recon Service Manual, Page 128Get this manual
CYLINDER HEADCYLINDERPISTON Install the camchain tensioner adjuster and boltsNOTE :
Confirm that the "1" mark on the flywheel is aligned with the index mark on the rear crankcase cover, while the punch mark on the camshaft is aligned with the index mark on the front crankcase
Apply clean engine oi the outer and inner surface of the cam fo llowersInstall the cam follower into the crankcase