Yasuni R-Pro Performance Exhaust with E-Pass – Yamaha BW’s / Slider (Minarelli Vertical)

The Yasuni R-Pro is the upgraded version of the Yasuni R — a true racing exhaust for the road, offering top performance while remaining street legal. Designed primarily for 70cc entry-level tuning cylinders, it can also be used with 50cc setups.

Delivering up to 12 hp and peak power between 10,000–12,000 rpm, the R-Pro provides excellent midrange punch, quick throttle response, and a notable increase in top speed.

For road approval, the system includes restrictors in the header and silencer. Removing them voids the homologation but unleashes its full racing potential. The spring-mounted silencer ensures a perfect seal and durability, just like professional racing systems.

Technical data :

Body : Sheet steel

Bracket : Stainless steel

Silencer : Aluminium (Red)

Street legal (E-marked / homologated)

Suitable for Minarelli vertical engines (Yamaha BW’s, Slider, etc.)