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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 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-stroke motorcycles are a type of internal combustion engine that completes a power cycle with two strokes of the piston during only one crankshaft revolution.
Engine 499 cc (30 cu in), 2-stroke, four-cylinder, liquid-cooled, reed valve induction with YPVS Bore Stroke 56.4 mm × 50.0 mm (2.22 in × 1.97 in) Compression Ratio 6.6:1 Fuel System Mikuni VM26SS 26 mm (1.0 in) carburettor x 4 Lubrication Yamaha Autolube two stroke injection, transmission gear pump. Ignition
The Yamaha V series are two-stroke step-through motorcycles made by the Yamaha Motor Company. There were a number of different engine capacities to suit different sections of the market. The bike was primarily released to compete with the ever-popular Honda Super Cub. It is also very similar to the Suzuki FR50. [1]
0W20: Liquid-cooled, inline-4, two-stroke engine, chromoly frame. Yamaha's first 500cc factory bike won from the outset at the first round of the 1973 season, ridden by Jarno Saarinen. 2nd 1974: 0W23: Yamaha's first machine created specifically for 500cc racing.