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The Yamaha PW50 is a commercially available two-stroke 50 cc (3.1 cu in) mini dirt bike, designed, developed and produced by Japanese manufacturer Yamaha since 1980. [ 7 ] [ 8 ] [ 9 ] References
The YZ125 used a conventional telescopic fork tube through 1988, then in 1989, added the first upside-down fork. A number of well known riders have chosen this as their go-to bike, such as AMA Champ Dom Barbuto and his brother Nick Barbuto, X-Games medalist Kyle Ford, and StinkBike Racing's own local Seattle legend Joey Merkin.
These bikes are less expensive, and require less time to complete. [30] Pit bikes are powered by 4-stroke, horizontal, single-cylinder engines ranging anywhere in displacement from 49 cc to 195 cc. A typical pit bike is usually a small dirt bike, but it has become common to be able to buy pit bikes with street-style wheels and tires.
The first bike manufactured by Yamaha was actually a copy of the German DKW RT 125; it had an air-cooled, two-stroke, single cylinder 125 cc engine [1] YC-1 (1956) was the second bike manufactured by Yamaha; it was a 175 cc single cylinder two-stroke. [1] YD-1 (1957) Yamaha began production of its first 250 cc, two-stroke twin, the YD1. [1]
The Yamaha YZ450F is a four-stroke racing motocross bike built by Yamaha Motor Corporation.It was the successor to the previous YZ426F which was discontinued in 2003. It is credited by Cycle World and Dirt Rider magazines as the bike that started the four-stroke dirt bike revolution.
A large range of after-market tuning parts are available, owing to the bike's design being fundamentally unchanged since 1999 and the sheer numbers sold over the last fifty years. According to US Dirt Bike magazine, it is the last 250 two-stroke from Japan.