Yasuni Exhaust R for Horizontal Minarelli '02-'11 "Bugeye" Zuma, SR50 Minarelli, and many more.Manufactured by renowned Spanish manufacturer Yasuni.

In terms of performance, the Yasuni R lies between The Yasuni Z and the Yasuni C16. Ideally suited for 50cc and 70cc sports and racing cylinders. To exploit its full potential, we recommend combining it with a 17.5mm carburetor (minimum) and a sports variator.

The "R" Does come with restrictors installed that will need to be removed for maximum performance gains!! Derestrict guide here