The Polini 154ccm cylinder kit is one of the wildest for this machine. Thanks to the special three-part exhaust port, the high flushing ducts and the exhaust valve, a sensible pull-up as well as good top power is ensured here. The cylinder is made of aluminum, which provides good heat dissipation. Access to this cylinder is stated by Polini to be 500km with a maximum of 3/4 throttle, which we recommend you follow. A long-threaded spark plug must be used for this cylinder. The kit is delivered complete incl. gaskets, piston rings, etc.