Yamaha RD48

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Yamaha RD48
Manufacturer Yamaha Motor Company
Production 1961 - 1962
Predecessor Yamaha YD1
Successor Yamaha RD56
Class Race Bike
Engine 246cc two-stroke[1]

The Yamaha RD48 was a two stroke 250cc Grand Prix racing motorcycle. It had two 56x50mm cylinders, disk valves, and an Oldham coupler joining the crank shafts. Weight was 100 kg and power 35PS (34.5 bhp).[1][2]

It was ridden by Tanahara Noguchi and Fumio Ito in Yamaha's first GP on Sunday, 21 May 1961, the French GP. Ito achieved 8th place and at the end of the 1961 season was 9th in the championship.

The engine was improved for the 1962 season generating a claimed 42 bhp at 10,000 rpm, however only the Singapore GP was entered.[3]


  1. ^ a b [1]
  2. ^ p18 MacKellar.
  3. ^ p21 MacKellar


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. 

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