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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 TX500 is a two-cylinder standard motorcycle built by Yamaha and sold in 1973 and 1974. Early models closely resembled the Triumph Bonneville in style. In 1975 the bike was renamed XS500 and then continued to be updated until 1978 when sales ended in the USA. In Europe, the model was available through 1980.
The Yamaha DS7 (or YDS7 in the UK) motorcycle was made from 1970 to 1972. A 250cc air-cooled twin two-stroke design includes a 12v battery ignition and a five-speed transmission. Making nearly 30 hp (22 kW) @ 7,500 r/min, the published top speed was 93 mph, with a 1/4 14.8 second quarter mile time.
Yamaha added four-stroke engines to their line-up when they released the XS650 XS1 in 1970. This bike was powered by a Hosk-derived four-stroke air-cooled twin of 654 cc. Work began on a successor to the XS650 two years before its 1972 debut. Although superficially similar to the XS650, the TX750 was an almost entirely new design. [9]
A straight-twin engine, also known as an inline-twin, vertical-twin, inline-2, or parallel-twin, is a two-cylinder piston engine whose cylinders are arranged in a line along a common crankshaft. Straight-twin engines are primarily used in motorcycles; other uses include automobiles, marine vessels, snowmobiles, jet skis , all-terrain vehicles ...
Yamaha R5 (1972) The Yamaha R5 is a motorcycle made by Yamaha for production years 1970 (R5), 1971 (R5B) and 1972 (R5C). [when?] It was the first iteration of a new generation of horizontally split crankcase two strokes that also included the RD350 and culminated in the RD400. The engine platform also included the 250cc variants (DS7/RD250 ...
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The BSA unit twins were a range of unit construction twin-cylinder motorcycles made by the Birmingham Small Arms Company (BSA) and aimed at the US market. A range of 500 cc (31 cu in), 650 cc (40 cu in) and 750 cc (46 cu in) twins were produced between 1962 and 1972, [1] but they were really developments of the older pre-unit A7/A10 model range with less weight. [2]