2026 Yamaha YZ 450FX

The Ultimate Woods Racer

The premier XC racer built to compete straight out of the box, the YZ450FX takes off road performance to the next level.

High Performance 450cc Four-Stroke Engine

The YZ450FX's thrilling liquid-cooled DOHC four-stroke engine is renowned for its broad power character and ease-of-use, with ECU settings tailored to enhance both low-end tractability and top-end power.

Industry-Leading Yamaha Power Tuner App

Like having factory team support in your pocket, Yamaha's groundbreaking next-generation Power Tuner App is even more user-friendly with an intuitive "Simple Tuning" slide bar for quick engine mapping selections, new four-level Traction Control, a lap timer, and helpful engine and suspension tuning guides. Best of all, it's free-of-charge.

Advanced Aluminum Bilateral Beam Frame

The advanced aluminum bilateral beam frame with YZ450FX-specific engine mounts provides just the right amount of strength and flex for the perfect balance of straight-line stability and cornering performance. The result is a better handling machine with lighter feel, more agility and increased traction, allowing the rider to tackle tight, technical courses with greater confidence.

Class-Leading Suspension

World renowned suspension performance straight out of the box. High-spec fully adjustable Speed Sensitive System KYB coil spring-type fork provides exceptional bump absorption, and now features toolless compression clickers for easy adjustment and fork covers to help prevent debris damage. The linkage-type rear suspension features a KYB shock with cross-country focused damping characteristics to match the YZ450FX's refined chassis.

Ergonomics Designed for Control

The YZ450FX's slim, flat, compact body eases rider movement for improved control, including seamless, rounded features from seat edges and side covers to the narrow fuel tank and front shroud. The rider triangle is also designed to provide increased legroom between the seat and foot pegs for enhanced rider comfort.

Key Features New for 2026

A new industry-first ECU lock function helps prevent theft and unauthorized engine start-up via a password-required lock.

New four-level Traction Control selectable within the Yamaha Power Tuner App maintains ideal rear wheel traction.

Engine

Compact, lightweight and durable clutch assembly yields smooth engagement and excellent feel.

The YZ450FX features a compact electric starter system to minimize restart delays and add convenience.

Tri-shaft transmission layout vertically stacks the transmission shafts for a lighter, more compact transmission.

A wide-ratio 5-speed transmission is geared for cross country, from tight technical single track to high speed open sections.

Lightweight handlebar-mounted switchgear allows the rider to quickly select between preloaded engine maps.

A convenient “Simple Tuning” slide bar further simplifies engine mapping within the Power Tuner App.

Yamaha's industry-leading Power Tuner App offers the ability to tune air/fuel mixture and ignition timing to suit rider preference.

An advanced fuel injection system uses a 44mm throttle body to ensure optimum fuel atomization and air/fuel calibration.

ECU settings are tailored to suit the specific needs of cross country and enduro competition.

Engine features include a reversed cylinder head layout, forged aluminum piston, titanium valves and dry sump lubrication.

The YZ450FX's advanced four-stroke engine is light, compact and renowned for its incredibly broad pulling power.

Chassis/Suspension

Fully adjustable Speed Sensitive KYB fork delivers exceptional balance between handling and bump absorption.

Premium Dunlop Geomax MX33 tires achieve an ideal balance of traction and durability.

The YZ450FX's 18-inch rear wheel comes laced with a three-cross-spoke pattern for improved impact absorption and rider feel.

Premium Excel wheels are strong, lightweight and reduce unsprung weight without sacrificing durability.

Wide foot pegs with lightweight aluminum alloy mounting brackets provide additional control and comfort.

Tapered aluminum handlebars are secured to four-position adjustable handlebar mounts.

The rider triangle is designed to provide increased legroom between the seat and foot pegs for enhanced rider comfort.

The YZ450FX's slim, flat, compact body eases rider movement for improved control.

Large 270mm front and 240mm rear discs combine with Nissin calipers to provide exceptional stopping power and control.

A linkage-type rear suspension with KYB shock features specially-tuned damping characteristics to match the chassis.

The fork now includes a hand-adjustable knob for easy compression adjustments.

An advanced aluminum bilateral beam frame strikes the perfect balance of precise cornering performance and handling stability.

Specifications

Engine

Engine Type - 450cc liquid-cooled DOHC 4-stroke; 4 titanium valves

Bore x Stroke - 97.0mm × 60.9mm

Compression Ratio - 13.0:1

Fuel Delivery - Mikuni fuel injection, 44mm

Transmission - 5-speed; multiplate wet clutch

Final Drive - Chain

Fuel Capacity - 2.1 gal

Chassis

Suspension/Front - KYB spring-type fork with speed sensitive damping; fully adjustable, 11.8-in travel

Suspension/Rear - KYB single shock; fully adjustable, 12.0-in travel

Brakes/Front - Hydraulic disc, 270mm

Brakes/Rear - Hydraulic disc, 240mm

Tires/Front - 80/100-21 Dunlop Geomax MX33F

Tires/Rear - 120/90-18 Dunlop Geomax MX33

Dimensions

LxWxH - 85.4 in x 32.5 in x 49.8 in

Seat Height - 37.6 in

Wheelbase - 57.9 in

Rake (Caster Angle) - 27°

Trail - 4.8 in

Max. Ground Clearance - 13.0 in

Fuel Capacity - 2.1 gal

Wet Weight - 251 lb

Other

Warranty - 30 Day (Limited Factory Warranty)