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    REBORE 450cc

    Hallo all! (Ciao tutti: italian version...) I'v got a project on going since 1 year: realize a Dirt Track from my XS400 '78. I'd increase power (torque) , to have this I'd rebore it from 69=391cc to 74=450cc. So I need new sleeves, quite easy to do, but first problem is to find pistons quite...
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