Gsxr cams will also do you some good. I helped the malaysianinvasion on his motor rebuild on a 92 kat. His head was shot due to a completely fucked spark plug hole. We pulled the top end, did rings, hone, gsxr head and cams with bandit header, custom mid pipe and my old vance and hines can off my fzr. Didn't spend enough time on the carb tuning tho and I guess it pulls like fuck till WOT and then shits the bed. I never got the chance to read plugs and tune it, then he had to lay it down into a curb to avoid running over the squid in front of him who broke his leg because he...well he was a squid, who cares? Shedding weight will help. Cams, pipes, jets and tuning will help more and is surprisingly affordable.