is the name of a Spanish manufacturer of motorcycle competition exhausts. In Barcelona, Spain, huge numbers of youths own 50cc mopeds, and Yasuni has quickly become one of the most commonly used exhaust in tuning these mopeds. Although tuning mopeds and riding them on the street is illegal in Spain, the local police tend not to do anything unless there is a case of street racing, but they do however randomly stop tuned bikes if the noise given off is too loud: an indication that it may be tuned.
Yasuni manufacture three different categories of exhausts: Scooter
Scooter Z, Scooter R, City R, City 16, Carrera 16, Carrera 20, Carrera 21, Carrera 30. http://www.italmotor.de/fb_ausp_yasuni.htm
Shown here is the Yasuni Scooter Z. he curled up shape of the exhaust is typical of a scooter exhaust.
R1, R2, R33 Carrera, HMR/2, SPR/3. http://www.opvoeren.nl/shop/plaatjes/R3%20tub809.jpg Shown here is the Yasuni R3 Carrera. It is different in shape from the scooter models, because it has a straight end, rather than a curved one.
Cross, Cross ML, Cross HM. http://www.opvoeren.nl/shop/plaatjes/Cross%20HM.jpg Yasuni Cross HM. As shown, the cross model exhausts are similar in shape to the road models, but are more curved where they attach to the cylinder.