Re: Over-Boring a Minarelli to 43mm

Noah K /
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What is the 43 mm piston for? Are you sure it has the same dimensions as a minarelli piston other than the bore? I would say try to bore it to 47 or so, whatever the Minarelli Polini kit is and use a Polini piston. If its possible to make it that big, you'll just have to look and measure to see if it would open the ports up too much.

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