cylinder kit Polini cast iron racing 63cc 10mm piston pin for Piaggio Si, CBA, Eco, Bravo 140.0133/10R

63cc cast iron racing Polini cylinder kit with 10 mm gudgeon pin for 50cc Piaggio / Vespa Boss, Bravo, Grillo, CBA, Eco and Si mopeds. The cylinder has a 43mm bore and achieves an output of 5.3bhp according to manufacturer´s claims.