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So I've got a 2009 Crf50, and I want to turn it into a pitbike. Anyone got a suggestion on where I should start? I'm not racing it, yet, not until its finished from the ground up. The bike runs fine, my little brother raced for a season and parents steered him towards school sports. My first opinion was either an 88cc or 105cc big bore kit, or maybe to start with the frame and suspnsion..... Any thoughts.....
Thanks in advance!

well if you want to race it eventually you'll need both power and suspension. if you want to just have some fun with it i'd go for the power first and the suspension next. more CC is better (no replacement for displacement).

ken