For Kenny Roberts' second assault on the World Championship the Yamaha 0W45 was built with an improved engine. The engine now had VM-type carburettors for increased power and torque. Next to Kenny Roberts also Christian Sarron and Johnny Cecotto were riding this machine. The 0W45 was also the basis for the TZ500 productionracer in 1980 (4A0 model).

Yamaha 0W45, 1979