Discussion Starter · #1 ·
I want to gt an old school yamaha rd400 which is 2 stroke 2 cylinder. these bikes are capable of some decent HP. I want to know what would be a good thickness to deck of the heads to get a decent performance gain? Id also be doing a port and polish. I dunno if 1 or 2 mm, or.010" or .02 would be correct? any ideas?