and to adjust the timing line up the T on the flywheel wiht the notch in the case (at 12 o clock) and the cam sprocket O should like up with the notch in the head (at 9 o clock) if they dont line up take the cam sprocket off and move the chain untill it gets there....then adjust the valves and turnt he engine counterclockwise 2 full turns, re align the T mark and the O mark and check the valves, if there is NO gap u did it right....if not try again...