Puch Polini Pisotns A,B,C, or D?

Preferences, experiences, general knowledge, please share....

I have an A and a B, figured I start with the A; anyone think differently, why?

Re: Puch Polini Pisotns A,B,C, or D?

I use an A, i had a b in a b cylinder but siezed it. (not due to it being a b piston tho)

now i use an a in a b cylinder works great thousands of hard fast miles on it, never a problem

Re: Puch Polini Pisotns A,B,C, or D?

Was wondering the same thing. What really is the difference between them?

Re: Puch Polini Pisotns A,B,C, or D?

size

Re: Puch Polini Pisotns A,B,C, or D?

I.R.E. Mike Pee /

If you can't bore or hone the nikasil, why would they have different size pistons? I understand why they would for a metra...

Re: Puch Polini Pisotns A,B,C, or D?

cuz the tolerance in manufacturing is never exact so they break it down into A,B,C and D.

that would be my guess

Re: Puch Polini Pisotns A,B,C, or D?

Thanks elliot; rumor has it your fast so I'll give the B/A combo try.

Re: Puch Polini Pisotns A,B,C, or D?

Thats an 'A' piston in a 'B' cyl not the other way around

Re: Puch Polini Pisotns A,B,C, or D?

I have never seen Polini pistons, but if they all look the same but have different letters on them, it could be from the mold they were made in (if they cast they). Just like in plastics.

Re: Puch Polini Pisotns A,B,C, or D?

🇮🇹💦 Of the Loin /

polini's warehouse guy says the difference between an A and a B is a thousanths of a mm.

0.001

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