cylinder kit Polini cast iron sport 79cc 49mm for Piaggio 50 4T 2V 140.0202

78.7cc cast iron sports cylinder kit from Polini for scooters with air-cooled Piaggio 4-stroke 2-valve engines. The cylinder has a 49mm bore and achieves an output of 6.5bhp at 7,500RPM according to manufacturer´s claims.