Original Polini piston for the Polini 39mm 50cc Motobecane kit.
If you're lucky enough to own a 50cc av10 Polini kit, you'll know how hard these are to come by. If you prefer the original Polini piston over our remakes, then now is your chance to stock up.
This one is specially coated. It is a "B" piston. So check your cylinder before purchasing.