Yamaha RD56
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Manufacturer | Yamaha Motor Company |
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Production | 1963–1964 |
Predecessor | Yamaha RD48 |
Successor | Yamaha RD05 |
Engine | 250cc two-stroke |
The Yamaha RD56 was a two stroke 250cc Grand Prix racing motorcycle. It had two 56x50mm cylinders, disk valves and an Oldham coupler joining the crank shafts. Power was 47 bhp at 11,000rpm.[1] Although the engine was essentially the same as that of the RD48, the frame was a new design based on the Norton Featherbed. It featured a 7 speed gearbox.
It was ridden by Yoshikazu Sunako, Fumio Ito, Hiroshi Hasegawa and Tony Godfrey for the 1963 Grand Prix season.
The engine was improved for the 1964 season generating a claimed 50 bhp at 11,000 rpm.[2] Phil Read joined the Yamaha team and narrowly beat Redman to become Grand Prix World Champion.
Hiroshi Hasegawa won the 1967 Macau Grand Prix.
References
[edit]Bibliography
[edit]![](http://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png)
MacKellar, Colin (28 August 1995). Yamaha: All Factory and Production Road-Racing Two-Strokes from 1955 to 1993. UK: The Crowood Press Ltd. p. 191. ISBN 1-85223-920-4.