I really hate to be a pain, but one last question. Head gasket blown for sure, ordered a complete gasket set from bikeberry, no prob. But when I deck the head and the cylinder, I know it's possible to take off too much, but how much is too much? I have machinists calipers so can measure the removal in thousandths. And can I do like on automotive heads and remove .020 for more compr, etc. 
