One of Yamaha's most famous machines has been restored, the YD 250 racer that Fumio Ito brought his 6rh place at the "Catalina GP" in 1958 in the USA.
Read more on the Catalina GP in this article, exit by << on top left of your page!
http://www.classicyams.com/race-bikes/early-factory-racers/yamaha-yd-racer-catalina-gp.html
READ THE STORY OF THE RAREST OF ALL YAMAHA RACERS, THE ORIGINAL FUMIO ITO CATALINA G.P. YAMAHA YD250 MACHINE !!
In June 1967, "Cycle World" published this unique feature about the very first Yamaha 350 cc racer.
The Yamaha RA75 125 ccm was the last version of the RA41 single cylinder machine. It was built in 1963.
As you have seen so many different factory racing bikes now, here is a chronological of the machines of the first period, up to 1968.