2007-2009 Honda TRX300EX TRX300X service manual, Page 121Get this manual
CYLINDER HEADVALVE Remove the camshaft end cap
Be careful not to let the bolts fall mto the crankcase
Remove the cam sprocket boltRotate the crankshaft counterclockwise one tu rn and remove the other cam sprocket bolt
Remove the cam sprocket off the camshaft flangeAttach piece of wire to the cam chain to prevent it from falling into the crankcase Lift the camshaft and remove itRemove the cam sprocket from the cam chainRemove the camshaft bearing stopper plate