Асама
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.