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About hoop58

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  1. hoop58

    xr200 big bore

    Clint, I woulld like to do this to my motor. Where do you get a 69 or 70mm piston? Who did you sleeving, stroker,(Powroll)? Case boring. Any info would be helpfull thanks mark chucknick1@comcast.net ??? I have done several 70mm bigbores and I am riding one now in my conversion CR-125. It requires a new sleeve and boring out the cases for it. You can opt for a stroker crank that is 6.5mm and gives you 20cc more, OR you can do both like I do and get 245ccs out of it. There is no cheap way that I know of to do it and it be reliable. Clint