Cant figure out how i can edit my post above.
i said:
"The porting is very low, so when you raise the cilinder by 22, the "timingen" (do i say it right? port-timing maybe?) will be higher."
raise the cilinder by 22.. i ment: Raise the cilinder about 2mm, you can do it with a piece of sheetmetal, or just fit extra gasket