2007-2009 Honda TRX300EX TRX300X service manual, Page 133Get this manual
CYLINDER HEADVALVE
CAMSHAFT INSTALLATION
Take ca re not to jam the cam chain into the crankshaft
Rotate the crankshaft counterclockwise while holding the cam chain and carefully align the "T" mark on the flywheel with the index notch in the crankcase cover
Apply engine oil to the camshaft bearingsApply molybdenum oil solution to the cam lobes,
CAMSHAFT BEARINGS
CAMSHAFT Install the camshaft bearing stopper plateInstall the cam sprocket onto the cam chain so that the timing marks are flush with the cylinder head surface and the index mark is facing up