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Seriously though, you're not going to get much more out of 125cc's, basically higher BHP = higher top speed.
Are you in the UK?
Yeah I'm from the uk. I can do my test for an unlicensed bike when I like, I have just been lazy and been putting it off. Decided to go out for a short ride today, got a nice 77Mph, curled up down hill with the wind gusting me along