The new generation of tuning exhaust system, optimised for standard engines with lower-mounted systems. Yasuni is always striving to provide the perfect system for the respective application. The Yasuni R1 MAX is as a moped exhaust and corresponds approximately to the power values ​​of the Cross ML. Specially designed for 50cc standard cylinders, this exhaust system is neatly powerful and unleashes the full power of the engine. Not recommended for 70cc engines. In the overview on image 2 is the schematic of the Yasuni R1 MAX. This tuning system is equipped with a high-quality aluminum silencer. All parts required for installation are included. Outlet size diameter: 25mm