Hi guys, not sure if i have done something wrong or not,,,23hp vanguard-16hp crank,arc long rods with 40ci intek flat top pistons,cheetha cam,double valve springs with billet retainers,billet flywheel,head ported and oversize ss valves,2bbl carb,question is when i set my valve lash at tdc on compression stroke to recommeded .004 all looks fine,but when i rotate motor over by hand i notice that at certain points the valves are "REALLY" loose,,is this normal or am i missing something?