Yamaha has revealed an extensively updated WR450F for 2027, with the off-road model receiving significant changes to its engine, chassis, suspension, clutch and braking systems in a bid to improve rider control across a wide range of terrain.
Based on the latest-generation YZ450F motocross platform that carried Jed Beaton to the 2026 Australian ProMX MX1 Championship, the new WR450F has been specifically tuned for enduro and trail riding, with development input coming from Australian and New Zealand riders, including members of the championship-winning ShopYamaha Enduro Team.
The biggest changes centre around making the bike easier to ride in technical conditions while maintaining strong performance on faster trails.
Engine updates include a redesigned intake port, revised cam timing and increased AC magneto inertia, all aimed at producing smoother and more controllable low-to-mid-range power delivery. Yamaha says the changes improve combustion stability, increase stall resistance at lower speeds and provide greater confidence in technical terrain.
The final drive gearing has also been altered, with the rear sprocket increasing from 50 to 51 teeth to further enhance drive and control in slower sections.
The chassis package has received equal attention, with Yamaha introducing a revised aluminium frame designed to balance rigidity and flex characteristics. A new front downtube design is intended to improve front-end feel and cornering performance while maintaining stability across rough off-road conditions.
Suspension duties continue to be handled by KYB components, although both ends have been updated. The rear shock receives a new piston design to improve low-speed damping performance and now features a hand-adjustable low-speed compression clicker, allowing riders to make changes without tools. Fork settings have also been revised with a more progressive feel aimed at increasing comfort, front-end grip and overall control.
Yamaha has also adopted a hydraulic clutch system for 2027. The new setup is designed to provide a lighter lever action, more consistent engagement and eliminate the need for clutch free-play adjustments during riding. A redesigned clutch hub also improves lubrication for increased durability.
Another notable change is a lighter rear braking package. The rear disc, master cylinder and piston diameters have all been reduced in size, resulting in a claimed weight saving of 180 grams while also improving rear brake feel and controllability.
Styling revisions include updated graphics and a sharper rear fender, while a new honeycomb-pattern seat cover is designed to make it easier for riders to move forward under braking while providing additional grip during acceleration.
Technology remains a strong focus, with Yamaha’s Power Tuner smartphone app carrying over. The system allows riders to adjust engine settings, traction control and launch control directly from their phone, while also incorporating an ECU lock function.
All Australian-delivered WR450F models will continue to be supplied with full ADR compliance and include Yamaha’s free off-road competition kit. The package includes Barkbusters handguards, a full-power throttle stop, braided front brake line, communication control unit map switch and various competition-oriented components designed for closed-course use.
While the WR450F receives the comprehensive overhaul, Yamaha has confirmed the WR250F remains mechanically unchanged for 2027, receiving only updated graphics.
Australian pricing and availability for the 2027 WR450F and WR250F will be announced closer to their local release.
