What is the valve clearance on a 2001 400 arctic cat 4x4 ATV?

open the helen screw and locate the sign on the alternator for top position piston

open the two covers where the valve are make sure while rotating the engine that the valves are in close open position when the sign is tdc

close the valve screw gently to max and open quarter round out for the inlet and one third out for the ex valve