Yamaha YA-1
Type of motorcycle / From Wikipedia, the free encyclopedia
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The Yamaha YA-1 is the first motorcycle produced by the Yamaha Motor Company. It was made from 1955 to 1958.[5] This was also the first vehicle in Japan to have a primary kick start system (allowing the engine to be started with the transmission in gear). The Society of Automotive Engineers of Japan (in Japanese), includes the 1955 Yamaha 125YA-1 as one of their 240 Landmarks of Japanese Automotive Technology.[1]
Quick Facts Manufacturer, Also called ...
Manufacturer | Nippon Gakki Co., Ltd.[1] |
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Also called | Yamaha 125 [1] |
Production | 1955—1958 [2] |
Assembly | Hamakita, Shizuoka, Japan [3] |
Predecessor | DKW RT125 [4] |
Successor | Yamaha YC-1 [1] |
Class | On-road sports bike [1] |
Engine | 123 cm3 (7.5 cu in) 2-stroke, air-cooled, single-cylinder[1] |
Bore / stroke | 52 mm × 58 mm (2.0 in × 2.3 in) [1] |
Power | 4.1 kW (5.5 hp) at 5000 rpm [2] |
Torque | 9.4 N⋅m (6.9 lbf⋅ft) at 3300 rpm [2] |
Ignition type | Dynamo [1] |
Transmission | Manual 4-speed [1] |
Suspension | F: Coil spring, R: Coil spring [1] |
Tires | F: 2.75-19-2P, R: 2.75-19-4P [1] |
Wheelbase | 1,290 mm (51 in) [1] |
Dimensions | L: 1,980 mm (78 in) W: 660 mm (26 in) H: 925 mm (36.4 in) [1] |
Weight | 94 kg (207 lb) [2] (dry) |
Fuel capacity | 9.5 L (2.1 imp gal; 2.5 US gal) [1] |
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