Again a new engine was made for the Yamaha 0W81 1985-86 machine. Crankshafts were now counter-rotating in order to achieve less gyroscopic effect. Eddie Lawson became second in the Championship and Christian Sarron third. In 1986 the bike got slightly more power resulting in a maximum of 145 ps. In 1986 Eddie lawson again won the World Championship and Taira became Japanese Champion with this bike for the 3rd time.

Yamaha 0W81, 1985-86