Big Brother takes over, where little is left out. A bigger and more powerful smidgeon, the Scooter R. Material: Steel / Muffler / Alu / Cone-Counter Cone / Usual. E-pass Spring bearing support, larger manifold diameter, a good compliment for 70cc Sport and Midrace cylinders. Available with either carbon- or aluminum silencer. Radius, like cylinder and carburetor must be modified. SIP-TIP! Lighter vario rollers, harder clutch springs, 17.5er carburettor, long racing gears SPORT cylinder Scooter Magazine German MOTORETTA May / June 2004: The Yasuni R is the best in the test, a real winner. German Scooter Magazine MOTORETTA March / April 2003: ... We can highly recommend this scooter for all maniacs who want to get the last drop of performance out of their original engine. SIP TUNING LEVEL 2-3/SPORT-RACE Rpm: -11,000