I've got a 90 yamaha I'm looking to add some extra pep too. I plan on adding Chris Carson reeds, 165 jets, a Hydrotec tuner. I want to mill the head down but don't know exactly how much to take off..
I want to run 89 octane (south fl, sea level, 80 degree temp average).
I helped a friend put a hydrotec kit on his 90 and I cc'd the head and got 43cc's. Unfortunately that's the only measurement I got off of it. Any help would be appreciated. I sent 88workcar a pm but I don't think my pm's are going thru.