YZ250F

For the 2019 season, Yamaha introduces the all-new YZ250F, the most sophisticated model in its class.

Featuring a newly designed high-performance electric start engine and an agile new chassis, this state of the art 250cc 4-stroke opens up a new era in wireless connectivity and trackside tuneability with its Yamaha Power Tuner smartphone app.

 

TOP FEATURES INCLUDE:

  • Innovative Hare Scramble/GNCC® Engine Design Based on the championship-winning YZ250F™, featuring Yamaha’s revolutionary rearward slanted, liquid-cooled, DOHC 4-stroke power plant with forward-positioned straight downdraft symmetrical intake, and with an added sixth gear and wide ratio transmission, the YZ250FX™ is an “out-of-the-box” Hare Scrambles/GNCC® competition machine.
  • High-Spec Engine The engine is based on the YZ250F, and includes all the same race-winning features: an updated cylinder head, lightweight forged, two-ring, flat-top piston; a shorter, more durable piston pin with diamond like carbon (DLC) coating; a revised piston oil jet, and advanced connecting rod, crankshaft, and counterbalancer designs. Together, the result is improved peak power, power delivery and overall durability.
  • 6-Speed Transmission A wide-ratio 6-speed transmission is used to insure the right gear is available for the wide variety of terrain found in cross-country racing.
  • Tuned Chassis Nearly the same bilateral beam frame that is found on the championship winning YZ250F is used on the YZ250FX. The forged section at the swingarm pivot and engine mounting brackets help develop nimble lightweight feeling in the tight technical terrain while still providing stability in fast sections.
  • Advanced Suspension Industry-leading, fully adjustable KYB® spring-type fork with speed sensitive damping features revised valving for improved suspension feel and balance. The linkage type rear suspension features a KYB rear shock with settings optimized for cross country racing.
  • Cross Country Features With the electric starting system, a 2-gallon fuel tank, rugged plastic skid plate, 18-inch rear wheel and XC racing tires, the YZ250FX is ready to win right out of the box.

 

 2019 YAMAHA YZ250FX R102 950

SPECIFICATIONS

ENGINE:

  • Engine Type – 250cc liquid-cooled DOHC 4-stroke; 4 titanium valves
  • Bore x Stroke – 77.0mm x 53.6mm
  • Compression Ratio – 13.5:1
  • Fuel Delivery – Keihin® fuel injection, 44mm
  • Ignition – TCI: Transistor Controlled Ignition
  • Transmission – Wide-ratio constant-mesh 6-speed; multiplate wet clutch
  • Final Drive – O-ring chain

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