The Yasuni R-Pro exhaust system is a further developed version of the Yasuni Scooter R and features a larger resonance volume as well as a wider cone. It was developed for mid-race engines and is designed for a wide usable RPM range. The enlarged resonance chamber and the adapted header pipe diameter are suitable for numerous 50 to 70cc mid-race setups. The high-quality workmanship and the attachment of the end silencer with sealing rings and springs ensure a precise and durable installation. Many Yasuni R-Pro exhaust systems have homologation and are delivered with a restrictor. Depending on the version, proof is provided via an E-marking on the exhaust or end silencer; a separate ABE is often not included. Technical Data Model: R-Pro Engine Type: 2-stroke Suitable for: 50–70 ccm mid-.
