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Yamaha YA-1. YA-1 built August 1954, produced January 1955. 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]
Yamaha's first four-cylinder model, the XS-1100 followed in 1978, again with shaft drive. [11] Despite being heavier and more touring oriented than its rivals it produced an impressive string of victories in endurance racing. The 1970s also saw some of the first dedicated off-road bikes for off-road racing and recreation.
Only three European riders came over to compete in the 1978 Trans-AMA Series due to the stiffening competition from American riders. [21] At the 1978 Motocross des Nations in Gaildorf, West Germany, Hannah had the rare opportunity to compete against reigning 500cc World Champion Heikki Mikkola, who was then near the peak of his racing career. [22]
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.
The Yamaha XS400 was produced by Yamaha from 1976 to 1983. The XS250 & XS360 are nearly identical variations of the same XS400 platform. Special, Special II, and Heritage badges denoted "factory custom" trim lines.
1978: 2nd 1979: 0W45: 2nd 1980: 0W48: Introduction of an aluminum frame to the YZR500. 2nd 0W48R: At round 4 of the season, the YZR500 returned to a steel frame, and the engine had the outer cylinders reversed and thus rear-directional exhaust. 1981: 0W53: Same rear-directional exhaust as the 0W48R, and the aluminum frame used a squared cross ...
How can you tell if they’re safe past their expiration dates? Here, doctors explain how long most vitamins last and any risks associated with taking expired vitamins.
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.