take carnz up on the free jets offer,
what machine shop are you using ?????
as stated above, only go as big as needed
ebensburgh yamaha bunged up my bottom end before, maybe they can do a bore job ???? a machine shop in j-town overbored it once for the size piston i sent with it, and adams cycle are just plain azzholes, hope you have a better lead ?????
and i'm close enuf to help you if needed