berrypicker
.020 Over
i was thinking of removing the cyl head and having it skimmed to bring the cr up to 10 to 1 do any of you tuners know how much to remove to achieve this Also can you give me some guidance on porting the r3 head ie the areas apart from any obvious ones ,while im at it il slot the cam sprockets and have a play with cam timing ,nothing radical just a bit of fine tuning been doing this kinda stuff for years