cylinder kit Polini cast iron sport 63cc 10mm piston pin w/o head for Piaggio Boxer, Bravo, CBA, Ciao, Eco, Grillo, Si

63cc cast iron sport cylinder kit without cylinder head with 10 mm gudgeon pin 50cc Piaggio / Vespa Boxer, Bravo, CBA, Ciao, Eco, Grillo and SI mopeds. The cylinder has a 43mm bore and achieves an output of 4.5bhp at 8,400RPM according to manufacturer´s claims.