for Sachs 50ccm 2T AC aluminium 48mm stroke 44mm 1 piston ring(s) with cylinder head TUNING RACE – for professionals Product description Summer in the city. The right cylinder for the hottest time of the year. Heat disation characteristics of the aluminum cylinder keeps your scooter as cool as your local ice cream parlor despite peak performance. Super durable, real power out of lower rpm’s, beats Corsa cylinders! Aluminum / 47mm bore / 10.500-11.500 rpm’s 5 ports, hard chromed bore, extreme compression. Periphery such as exhaust carburetor and transmission have to be modi. ed. Maximum speeds up to 115 km/h possible. Not road legal!