1993-2000 Honda TRX300EX Service Manual, Page 79Get this manual
Cylinder HeadCylinder Piston Turn the rankshaft counterclockwise one full turnInstaH and tighten the other cam sprocket boltTorque: 20 N'm 12.0 kg-m, 14 Ib-ft)
Install the camshaft bearing stopper plateApply sealant to the camshaft end capInstall the camshaft end cap into the cylinder head groove securely
(2) END CAP
Cam Chain Tensioner Installation
Turn the cam chain tensioner lifter shaft clockwise to the fully retracted position using the special tool and secure it into the groove as shown