Yamaha Reveals Major 2027 Updates to WR450F; WR250F Returns Unchanged

Yamaha's 2027 WR450F has been substantially updated to improve rideability across a wider range of off-road terrain. The changes span the engine, frame, suspension, clutch, brakes, bodywork and electronics. Yamaha positions these updates around making the bike easier to ride both quickly and at technical low speeds.

• Intake port redesign and cam timing changes produce a more linear delivery focused on low- to mid-range torque for better throttle control. Yamaha also increased alternator inertia to stabilize combustion and reduce stalls at low speeds. These changes are aimed at technical singletrack and other situations that need controllable power.

• Retains a 450cc four-stroke layout with a 44mm Mikuni throttle body and a five-speed wide-ratio transmission using a tri-shaft layout.

• New frame with revised front downtube balances rigidity and flex to deliver greater stability and improved front-end feel for cornering.
• Fork settings revised to be more progressive, improving initial movement comfort and front contact on rocky, rooty or technical sections.
• New high-performance KYB rear shock uses a redesigned piston to improve low-speed damping and expands damping adjustment range. The shock includes a hand-operated low-speed compression clicker for on-trail tuning.

• New hydraulic clutch provides lighter lever feel and smoother, more consistent engagement, removing the need for frequent on-trail clutch adjustments. A new clutch inner hub is lubricated over a larger area for stable performance and durability.
• Rear braking components—disc, master cylinder and piston—have been reduced in size to improve controllability and shave 180 grams of weight.
• Bodywork updates include a sharper rear fender, new WRF graphics and a honeycomb-pattern seat cover designed to make sliding forward while braking easier and to reduce sliding rearward under acceleration.

The 2027 WR450F targets riders who need a versatile enduro bike that behaves predictably at low speeds while still being capable on faster trails. The combination of revised power delivery, a chassis tuned for front-end feel, progressive suspension settings and a hydraulic clutch reduces rider workload in technical terrain and during long trail days. The smaller, lighter rear brake hardware aims to improve modulation without sacrificing stopping power.

Yamaha has moved the WR450F toward a more controllable, trail-friendly character through coordinated changes to engine behavior, chassis dynamics and rider controls. The WR250F remains available unchanged for those who prefer the smaller-displacement option, with a possible redesign expected in 2028.