The Bike

Yamaha YZ250F

The YZ250F has been a wildly successful machine for the Kemea Yamaha Official MX2 Team and sets the standard for 250cc four-stroke competition motocross bikes. Yamaha Racing have been putting up the numbers on the YZ250F since 2001 and the bike has been praised for combining the broad-power profile of the four-stroke engine while maintaining the lighter, more maneuverable form of the smaller 125cc bikes.

The YZ250F has seen its share of exciting times in the MX2 category, but none more so than the 2005 season where Yamaha Riders’ Antonio Cairoli, Andrew McFarlane and Alessio Chiodi placed first, second and third in the championship riding the YZ250F.

With over a decade and a half of real world racing experience and a constantly evolving engineering philosophy behind it the 2018 YZ250F, revealed this season, is set to continue the impressive legacy of the model, from the gate to the flag.

Main titles
2005 Antonio Cairoli: World Champion
2007 Antonio Cairoli: World Champion
YZ250F

Technical Specifications

Bike

  • Model:
  • YZ250F
  • Engine type:
  • Single cylinder, liquid-cooled, 4-stroke, DOHC, 4-valves
  • Displacement:
  • 250cc
  • Bore x stroke:
  • 77.0 mm x 53.6 mm
  • Compression ratio:
  • 13.5 : 1
  • Lubrication system:
  • Wet sump
  • Clutch type:
  • Wet, Multiple Disc
  • Fuel system:
  • Fuel Injection
  • Ignition system:
  • TCI
  • Starter system:
  • Kick
  • Transmission system:
  • Constant Mesh, 5-speed
  • Final transmission:
  • Chain

Chassis

  • Frame:
  • Semi double cradle
  • Front suspension system:
  • Upside-down telescopic fork
  • Front travel:
  • 310 mm
  • Caster angle:
  • 26o 50
  • Trail:
  • 118 mm
  • Rear suspension system:
  • Swingarm, (link suspension)
  • Rear travel:
  • 315 mm
  • Front brake:
  • Hydraulic single disc, Ø 270 mm
  • Rear brake:
  • Hydraulic single disc, Ø 245 mm
  • Front tyre:
  • 80/100-21 MS32
  • Rear tyre:
  • 100/90-19 MS32

Dimensions

  • Overall length:
  • 2,170 mm
  • Overall width:
  • 825 mm
  • Overall height:
  • 1,280 mm
  • Seat height:
  • 965 mm
  • Wheel base:
  • 1,475 mm
  • Minimum ground clearance:
  • 330 mm
  • Wet weight (including full oil):
  • 105 kg
  • Fuel tank capacity:
  • 7.5 litres
  • Oil capacity:
  • 0.9 litres