sanekit
1,500 RPM
forgot about that. hahahaha! he can at least check the one that is closed.Not so easy leh! To test all by hand for movement, you still need to rotate the crank shaft until piston is right on top so that valves are completely closed for tappets to have free play. While piston are down or midway the tappets are pushing onto the valves so they will be tight....lol