1993-2000 Honda TRX300EX Service Manual, Page 78Get this manual
Cylinder Head Cylinder Piston Cam Chain Tensioner Releasing Remove the sealing bolt and sealing washer (page 7-7)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[s TOOL Tensioner stopper
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The tensioner wiU extend automatically by the spring force when the special tool is removed
(1) 1s ;;, TENS lONER STOPPER
Camshaft Installation
A lign theT" mark on the flywheel with the index mark on the left crankcase cover by turning the crankshaft counterclockwise