Yamaha unveil new WR250F and WR450F enduro models

Published: 22 September 2017

Yamaha have updated their WR250F and WR450F enduro models with GP-developed engine and chassis technology.

Both WR models are powered by a reverse cylinder, which means the exhaust exits at the rear of the engine, increasing intake and exhaust efficiency.

For 2018 the WR250F gets a new cylinder head design with reshaped intake and exhaust ports and shorter intake funnel to boost top end power. To help boost the low to mid range power Yamaha also added new camshafts and valve springs.

Both the ECU and suspension have been tweaked to make the most of the new power delivery.

Yamaha haven't just worked on the engine, the WR250F gets the same aluminium beam frame that is used on the YZ250F motocross bike to improve handling. To save weight, the kickstart mechanism has been removed.


The WR450F gets fewer updates, with Yamaha revising both the ECU and suspension of the bigger model. The kickstart mechanism has also been removed from the WR450.

The new models, also featuring new graphics and blue rims, will be available in October.

WR250F new features

  • Newly designed cylinder head
  • Lightweight flat top piston with DLC coating
  • Intake and exhaust camshafts and valve springs
  • Shortened intake funnel
  • New ECU
  • Redeveloped YZ250F-based aluminium frame
  • Optimised suspension settings
  • Additional side cover
  • New graphics and blue rims

WR450F new features

  • New ECU and engine maps
  • Optimised suspension settings
  • Additional side cover
  • New graphics and blue rims

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