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.
Along with the 125cc RA41, the RD48 contended at Yamaha's first official entry of the 1961 Isle of Man TT, with team riders Fumio Ito (11th RA41, 6th place, RD48), Yoshikazu Sunako, Osamu Masuko, Taneharu Noguchi (17th place RA41), Hideo Oishi (12th place RA41), New Zealander Peter Pawson and Brit Tony Godfrey. Masuko (Winner of the 1957 250cc Mount Asama Race) crashed in practice and was replaced by Guatemalan Luis Giron.
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]
Referencesedit
^ ab"RD48 - Racing Information | Yamaha Motor Co., Ltd".
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. ISBN1-85223-920-4.
Ainscoe, Raymond (2011). Yamaha at the TT Races 1961 to 1968. UK: Ilkley Racing Books. p. 40. ISBN978-0-9524802-7-3.
External linksedit
Yamaha Race Archive of the RD48
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yamaha, rd48, stroke, 250cc, grand, prix, racing, motorcycle, 56x50mm, cylinders, disk, valves, oldham, coupler, joining, crank, shafts, weight, power, 35ps, manufactureryamaha, motor, companyproduction1961, 1962predecessoryamaha, bsuccessoryamaha, rd56classra. 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 Yamaha RD48ManufacturerYamaha Motor CompanyProduction1961 1962PredecessorYamaha YD A YD BSuccessorYamaha RD56ClassRace BikeEngine246cc two stroke 1 It was ridden by Tanahara Noguchi and Fumio Ito in Yamaha s first GP on Sunday 21 May 1961 the French GP Along with the 125cc RA41 the RD48 contended at Yamaha s first official entry of the 1961 Isle of Man TT with team riders Fumio Ito 11th RA41 6th place RD48 Yoshikazu Sunako Osamu Masuko Taneharu Noguchi 17th place RA41 Hideo Oishi 12th place RA41 New Zealander Peter Pawson and Brit Tony Godfrey Masuko Winner of the 1957 250cc Mount Asama Race crashed in practice and was replaced by Guatemalan Luis Giron 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 References edit a b RD48 Racing Information Yamaha Motor Co Ltd p18 MacKellar p21 MacKellarBibliography editMacKellar 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 Ainscoe Raymond 2011 Yamaha at the TT Races 1961 to 1968 UK Ilkley Racing Books p 40 ISBN 978 0 9524802 7 3 External links editYamaha Race Archive of the RD48 nbsp This motorcycle scooter or moped related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Yamaha RD48 amp oldid 1127913572, wikipedia, wiki, book, books, library,
