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i bought a brute force that has some motor work done to it and i would like to know what size cc it comes to? it has a 750 crank and rods and 650 cylinders bored .20 over with flat top pistons with stock heads i was told it was roughly a 780 but i am not sure. also i have a 800 big bore kit for a prairie engine and was wondering if i put the 800 pistons(designed for the 700 prairie crank) on a 750 brute crank what the size would be or if it would work at all. i dont know the rod length or crank length of either bike so i cant figure this out thanks
 

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The 800 pistons would still be an 800 the 700 and 750 use the same crank 66mm
 

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take those pistons and cylinders down to a machine shop and say make these fit! install and in joy!
 
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