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Message: <blockquote data-quote="shiroitenshi" data-source="post: 2182938" data-attributes="member: 27518">Strange story eh akuma.. running 82mm bore with 81pistons. Actually can run, although I'd be thinking the pistons skirts would show some scratches on them being run so loose with the stock compression and oil ringsAnyway.. I oso confused with that measurement of 81.25/81.5 ... but from what little I know, the bore is used to calculate capacity, not the piston size.. Since actual compression is aided by the ring seal, so it's possible to run pistons either tightly (with tight tolerances) or loosely (with looser tolerances)Some pistons need less than .5mm clearance, like .25mm or so, while some are actually running .5 piston wall clearance (forged units). This actually affect capacity (though not by much)..So I think maybe it's the same piston size, but in a looser bore? .25mm is kind of a bit tiny difference, no?</blockquote>

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