head shaving on a cr 250

[Wheelie]

i have a cr 250 that that i want to run a higher octane (no ethanal bull shittt ) i was looking in to running avgas (100ll)how much will the head halft to be shaved down to get it running it full potenchal on av gas . my shop teacher is a machinist and sed he wil do it 4 me but has no clue on how much to take off???? 20, 30 ,60 ????? thanks zac

[fufanu360]

man i dunno if i would trust him to machine it if hes not very familiar with them, im sure he is a good machinist but i would take it to a respectable motor shop

[MX86]

i run leaded race fuel in my bike sometimes... then others that VP stuff.. i dunno nothing about head shaving i think ya hae to ask denny or another machinist that is good with engines and stuff