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The Yamaha YZ125 is a motocross racing motorcycle with a two-stroke 124.9 cc (7.62 cu in) displacement single-cylinder engine made by Yamaha since 1974. It is available to the public. For the first two years it was made with dual rear shocks, then changing to a monoshock. [3]
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 original YZ250 of 1974 used an air-cooled 250cc two-stroke engine of 70 mm bore and a 64 mm stroke, which was improved semi-annually. The air-cooled motor was replaced in 1982 with a 249 cc liquid-cooled two-stroke reed-valved engine with a mechanical, rather than servo-driven, YPVS exhaust valve for a wider spread of power. Although other ...
Two broken wrists in 1976. The first while trail riding his Yamaha YZ-125 motorcycle. Someone cut him off and he grabbed his front brake too hard, reacting as racing a bicycle. The second happened on a bicycle track in approximately September. He raced the last months of the 1976 season in a cast. [10] [21]
If 1981 was a difficult year for Hannah, 1982 may have been the lowest point his career. For the Supercross series, he finished ninth winning only one round. [14] Yamaha team manager Kenny Clark moved Broc Glover to the 250cc class in the Nationals and Hannah to the 125cc class. Hannah had not raced 125’s in four years.
Yamaha introduced their first ATC, the Tri-Moto YZ125. Kawasaki followed suit the next year with the KLT200, while Suzuki produced their first model, the ALT125, in 1982. As the popularity of ATCs increased dramatically, rapid development ensued.
Yamaha entered the ATC market in 1980, after paying patent-right to Honda to produce their own version of the All Terrain Cycle. Starting modestly with a 125cc recreational ATC that would remain the foundation of their line through 1985, the YT125 featured a 2 stoke engine with sealed airbox with snorkel intake, an autolube oil injection system, and featured a narrow tunnel above the engine ...
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.