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.

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.

Key Features

• 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, 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 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.

New For 2026

• An industry-first ECU lock function helps prevent theft and unauthorized engine start-up via a password-required lock.
• Four-level Traction Control selectable within the Yamaha Power Tuner App maintains ideal rear wheel traction.

Other Features

• Sleek air cleaner cover provides tool-free access to the air filter for simplified servicing.
• Premium competition-inspired graphics are embedded to provide excellent durability and scratch resistance.
• Other enduro-specific features include a 2.1-gallon fuel tank with warning indicator, composite engine guard and sealed drive chain.
• Additional features include a PVC handlebar pad, seamless seat cover, updated switchgear and a folding aluminum kickstand.