Originally Posted by MRX4-R03
This is probably why you did not see any increase in power, these are the only way's I have see done:
I also have tried it my self: and have gotten some top end improvements
Its not off this button is for a axe rossi x3 engine so the bolt pattern is different.
doing it that way requires a major gain in combustion chamber volume meaning you haft to totally reshim where as the other way you dont. Both will get you the same results though.