Next to the YZ607 there was also the YZ608, the 350 cc bike. This was a further development of the first try-out, the Z608, based upon the street YR1.

Again, like with the YZ607, many parts were taken from the "shelves" (factory racers), like the huge RD05 brakes. But you can see the substantial difference in the engine. The YR1 was the first Yamaha motor with horizontal split crankcases and also unit Mikuni carburetors were fitted.

Yamaha YZ608 350 ccm