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The Yamaha DT250 was preceded by the 1968 DT-1. The DT250 began production in 1971 and was produced through 1982. Other models produced in the DT250 group were the DT250F and DT250MX. [2] The DT250 was released three years earlier than the Yamaha DT125. The DT250 was one of the leading dual-sport machines in the 1970s. [3]
The Yamaha DT is a series of motorcycles and mopeds produced by the Yamaha Motor Corporation. Models in the DT series feature an engine displacement of 50 to 400 cc (3.1 to 24.4 cu in). The first DT model, the DT-1, was released in 1968 and quickly sold through its initial 12,000 production run.
1971 Yamaha AT1C Each year, the AT1 was also available in the Motocross edition designated by an M. The M models were very similar to the regular models other than a few performance-enhancing features, such as weight reduction, higher compression ratio, tuned exhaust, larger carburettor with 26 mm throttle bore, and tuned gearing ratio.
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.
The Gas Gas EC, also known as Enducross, is a series enduro motorcycles manufactured by Gas Gas since 1989. It is currently marketed with two different engines: on the one hand, with the traditional engine of two-stroke in various displacements (from 80 to 300 cc) and the other, with a 250 cc four-stroke engine (in which case the bike is called EC FSE, or EC F).
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