Please realise that these bikes are 50 years away from Valentino Rossi's M1...! Just received positive comments from Chip Hellie about these bikes, we are going to look carefully at the specifications soon!

These 1957 machines were Yamaha's first 250 cc racers. The "A" had a bore x stroke of 54 x 54 mm and the "B" 56 x 50 mm. Power was 26 PS and weight around 100 kg.

Yamaha YDB 1957

Yamaha YDB, Ito's Catalina bike

This second picture shows Ito's bike, which he used in the Catalina G.P.