2fast offers here a ø50mm Racing cylinder engine Minarelli Horizontal liquid Cooled. The 2Fast the best high-end 90cc cylinder on the market, a must! 6 aluminum cylinder transfers Barete exhaust, cylinder head stud ... very heavy! Of course, we recommend a racing exhaust, an inner rotor ignition and a big carburetor. Attention! 45,8mm stroke crankshaft required! The italian brand 2Fast in partnership with Jollymoto has developed a range of exhaust racing to match perfectly with the rolls of the brand. They are made by hand, the muffler is aluminum color. Very torquey and powerful Exhaust System.