All-New Aluminum Bilateral Beam Frame

A completely redesigned aluminum bilateral beam frame based on the class-dominating YZ250F provides just the right amount of strength and flex for the perfect balance of stability and cornering performance. The result is a better handling machine with lightweight feel and increased front wheel traction, allowing the rider to enter corners with greater confidence and more line choices.

New Air Intake

Optimized intake path draws air from under the side covers and seat allowing for a lighter, slimmer and more compact body. This redesign allows radiator shrouds to be 50mm slimmer and the airbox cover to be lower and more narrow. The more efficient intake path also boosts mid- to high-rpm engine performance.

New Yamaha Power Tuner App

Like having factory team support in your pocket, Yamaha's groundbreaking Power Tuner App is revised to be even more user-friendly. New features include an intuitive "Simple Tuning" slide bar for engine mapping, Traction and Launch Control tuning, a lap timer, along with helpful new engine and suspension tuning guides.

New Traction Control & Launch Control

The all-new four-level Traction Control System communicates wheel slip to the ECU, tuning the engine to maintain ideal rear wheel traction. An updated Launch Control System now features an rpm limiter which can be adjusted in 500 rpm increments between 6,000 rpm and 14,000 rpm for optimized launches when the gate drops. Both systems are controlled through the Yamaha Power Tuner App.

New Switchgear

A new handlebar-mounted multi-function switch allows simple on-the-fly selection between two preloaded engine maps with the push of a button. Maps are loaded and configured with the Power Tuner App.

Revised Suspension Settings

Class leading, fully adjustable KYB® coil spring-type fork with speed-sensitive damping delivers exceptional balance between handling and bump absorption for championship-winning performance. New for 2025, the fork now includes a hand-adjustable knob for easy compression adjustments, and revised suspension settings improve bump reaction to deliver an exceptional balance between cornering performance and high-speed stability. Linkage-type rear suspension features a KYB® shock with revised settings to provide less pitch on corner entry/exit for improved stability.

Slimmer Body & Improved Ergos

The new 2025 YZ250FX features a slimmer, flatter body design for improved control, including a slimmer fuel tank, a 15mm lower airbox and 50mm narrower radiator shrouds for easier rider movement and cornering performance. The rider triangle is also improved with increased legroom between the seat and foot pegs for greater rider comfort.

Engine Type: Liquid-cooled, 4-stroke, DOHC, 4-valve

Displacement (cc): 250.0

Bore x Stroke (mm): 77.0 x 53.6

Compression Ratio: 13.8 : 1

Lubrication System: Wet sump

Fuel Management: Fuel Injection

Ignition: TCI

Starter System: Electric

Fuel Tank Capacity (L): 8.2

Final Transmission: Chain

Transmission: Constant mesh 6-speed

Frame Type: Bilateral beam

Suspension Front: Telescopic forks, 310mm travel

Suspension Rear: Swingarm (link suspension), 317mm travel

Brakes Front: Hydraulic single disc, 270mm

Brakes Rear: Hydraulic single disc, 240mm

Tyres Front: 80/100-21 51M Tube type

Tyres Rear: 110/100-18 64M Tube type

Length (mm): 2175

Width (mm): 825

Height (mm): 1280

Seat Height (mm): 955

Wheelbase (mm): 1480

Ground Clearance (mm): 320

Wet Weight (kg): 111