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YZR250(0WB9)

View machine data for past races Yamaha has competed in.

  • SEASON
  • RIDERS
  • MACHINES
  • ARCHIVE
  • MotoGP
  • 500cc
  • 250cc
  • 125cc
  • 750cc

250ccYZR250(0WB9)(1990)

Balancer-fitted single crankshaft, 90-degree V-twin

This model featured further development of the single crankshaft, 90-degree V-twin engine that had been under development from 1987. The frequent crank assembly problems that plagued the 1988 0W90 and 1989 model 0WA7 were solved by a full-scale re-engineering of the crank. Engine vibration was also reduced with the adoption of a coupled-force balancer. Furthermore, rigid engine mounts were used to make the engine a stressed member of the frame, which helped boost handling performance. The 1990 model 0WB9 powered J. Kocinsky to the GP250 World title and its single-crankshaft V-twin engine technology was fed back into the 1991 model TZ250 and the production sport model TZR250.

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Gallery & Wallpaper
  • Spec

    • Capacity - 249cc
    • Max Power - 80PS
  • Records

    1990

    1st: 3 Luca Cadalora Team Marlboro Yamaha Agostini Japan, Austria, UK
    1st: 7 John Kocinski Team Marlboro Yamaha Roberts USA, Spain, Italy(Nations), The Netherlands, Belgium, Hungary, Australia

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