Polini Power Kit for water-cooled scooters with large 125-150ccc Piaggio 4V Euro 4 four-stroke engines with direct fuel injection. With 61mm diameter and 58.7mm stroke, this aluminum cylinder kit is taken to a whopping 171.8ccm capacity! The cylinder can be used on injection engines. The cylinder surface is hard-chrome plated and the edges of the piston rings are also coated with chromium, to reduce the friction to a minimum. The control unit (ECU / 171.0008) as well as the suitable connection cables (171.0204) are included. 100% Made in Italy.