From their entry into the motorcycle market in 1955 Yamaha have grown to be one of the big four motorcycle manufacturers in Japan. During the 70’s they won the first of many 500cc world championships and have maintained that success through to the modern era of Moto GP. During the 80’s Yamaha introduced the EXUP, a new exhaust system for 4-stroke engines that included a power valve which optimized the width of an engines powerband. The first of their YZF models the R1 was released in 1998 and shortly followed by the R6 in 1999 and since then they have gone from strength to strength especially with the introduction of their MT range in recent years. Scorpion have a long history of producing performance exhausts for numerous Yamaha models over the years and have supported many teams in top flight racing.