shreddr,
IMO except for exhaust,cam, intake system, chip, and maybe a fuel management system its not worth it to do anymore to the engine.
The key is the suspension !
That where you want to put your money.
If you don't believe me I know a guy who borrows,(Ivan
), my Rt airhead and passes R1200s, modified 1100s, and gsxer, in the tight stuff.
cya
jeff