Yasuni sports exhaust system optimised for 70cc cylinders. Yasuni is always striving to offer the perfect product. The Yasuni R is the perfect scooter exhaust. Developed from the Yasuni Z system and perfectly adapted to 70cc sports to mid-race cylinders. A little more volume and a slightly wider cone mean greater efficiency and a more performance on these cylinders. The R works very well on 50cc engines, but it’s also great on a 70cc This scooter exhaust system is equipped with a high quality black anodised aluminium silencer. All necessary parts are included. Fits Peugeot engines with horizontal cylinder (not Speedfight 3) and Derbi scooter with engine. NOTE:. 2 Different mounts for Peugeot and Derbi engines are included.