cylinder kit Polini aluminum racing Evolution 70cc 12mm piston pin for Minarelli horizontal LC 166.0113

70cc aluminium Racing Evolution cylinder kit from Polini with 12mm gudgeon pin for scooters with water-cooled Minarelli horizontal engines. The cylinder has a 47.6mm bore and achieves an output of 21bhp at 13,400RPM according to manufacturer´s claims.