Lunch with Kenny Roberts | Motor Sport Magazine Archive
So Yamaha started from scratch once again, building the 0W61, a rotaryvalve V4 which used a complex system of gears to drive the rotary valves. The bike was a disaster. "That thing was so bad that Mike Maekawa [Yamaha's race chief] personally pushed the bikes into the crusher at the end of the season." Yamaha made a better version for 1983.