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Chassis / Suspension

• ALUMINUM FRAME: Upper frame bracing provides rigidity and durability, while rear frame spars and cross-country-tuned engine mounts centralize mass for the best possible balance of bump absorption, stiffness and rider feeling.
• COMPACT BODY AND SEAT DESIGN: The YZ450FX features stylish bodywork from tip to tail, including a large 2.15 gallon, mass-centralized fuel tank. The body design is narrow for more comfortable knee grip and control feeling, while the narrower and lower seat gives the rider additional room to move aboard the machine.
• CLASS-LEADING SUSPENSION: Industry-leading, fully adjustable KYB® coil spring-type fork with speed sensitive damping provides exceptional balance between handling and bump absorption, for race-winning handling performance. The linkage type rear suspension uses a KYB® shock with specially-tuned damping characteristics to match the YZ450FX chassis. And both front and rear systems feature settings for optimal GNCC® performance.
• 270 MM FRONT BRAKE: Large 270mm front disc brake coupled with aggressive pad material offers outstanding braking performance and machine control, with exceptional stopping power and controllability.
• CROSS-COUNTRY WHEELS AND TIRES: The YZ450FX features enduro-specific tires for the ideal balance of traction and durability, complete with an 18-inch rear wheel. Each wheel’s cross-sectional profile is computer-designed to shave valuable weight without sacrificing durability, too.

Engine

• REARWARD-SLANTED CYLINDER DESIGN: The YZ450FX’s distinct rearward-slanted cylinder design—complete with rear exhaust and forward-mounted intake system—features a cylinder head that works with the frame geometry for optimized weight distribution. Inside, the engine features a straight intake tract, aggressive cam profiles, a high-compression “box bridge” piston design with DLC-coated piston pin, and more. Finally, the YZ450FX features specific ECU settings to suit the needs of cross-country riders.
• ELECTRIC STARTER SYSTEM: The YZ450FX features a compact electric starter system to minimize restart delays on track and add convenience everywhere else. Powered by a high-capacity and ultra-lightweight four-cell lithium-ion battery, the system adds minimal weight.
• YAMAHA POWER TUNER APP: Breaking new ground in the industry—again—Yamaha created the Power Tuner app, which brings the power of the GYTR Power Tuner to your iOS® or Android® device. Using wireless connectivity to talk to the bike’s onboard CAN-bus network, the app allows owners to adjust air/fuel mixture and ignition timing maps to tune engine performance for track conditions, record race log information, and monitor a range of data such as maintenance and system diagnosis, engine run time, and more.
• ADJUSTABLE ENGINE MAPPING: A handlebar-mounted map switch allows the rider to quickly select between preloaded engine maps—loaded and configured in the Power Tuner app—to account for changing track and weather conditions.
• ADVANCED FUEL INJECTION: The engine breathes through a 44mm Mikuni® throttle body fed by a high pressure electric pump to ensure optimum fuel atomization and power for a wide range of riding conditions.
• ROBUST TRANSMISSION AND CLUTCH: The YZF450FX’s wide-ratio 5-speed transmission enhances cross-country performance for more flexible gearing selection in open terrain.

Other Features

• GNCC®-FOCUSED DETAILS: The YZ450FX includes a range of cross-country specific upgrades compared to the YZ450F motocrosser, including a composite engine guard, 18” rear wheel, sealed O-ring chain, fuel level warning indicator and a folding aluminum kickstand.
• ADJUSTABLE HANDLEBAR MOUNTS: The 4-position adjustable handlebar clamps are rubber mounted to improve comfort, reduce handlebar vibration and allow riders to adjust the bar position, while the oversize 1-1/8” handlebar itself is strong but lightweight.
• EMBEDDED GRAPHICS: Yamaha’s unique embedded graphics are built into the bodywork for extended durability, resisting both peeling and damage.

Top Features

• YZ450F™-BASED GNCC® / HARE SCRAMBLES FOCUSED RACER: The YZ450FX™ is developed from Yamaha’s flagship motocross model—the YZ450F—with many added features and unique settings that make the YZ450FX the ultimate GNCC®/Woods racer.
• YAMAHA POWER TUNER APP: Yamaha’s exclusive Power Tuner app puts the flexibility and precision tunability of the GYTR® Power Tuner into your smartphone. Make fueling and ignition timing changes instantly and upload them to the bike for the ultimate in track-side tuning.
• ADJUSTABLE ENGINE MAPPING: A handlebar-mounted map switch allows the rider to quickly select between preloaded engine maps—loaded and configured in the Power Tuner app—to account for changing track and weather conditions.
• ELECTRIC STARTER SYSTEM: Utilizing a compact starter motor and ultra-lightweight lithium battery, the YZ450FX maintains the convenience of push-button starting, for effortless restarts under pressure, and relaxed riding when the clock isn’t ticking.
• POTENT FUEL-INJECTED ENGINE: A high-compression cylinder head, forged piston, aggressive cam profiles, cylinder geometry and much more work together to give riders the ideal power spread in challenging GNCC® racing conditions.
• CLASS-LEADING SUSPENSION: Yamaha uses KYB® spring-type forks on all of our YZ® models, with industry leading function and easy set-up at the track—these forks are ready for the top step of the podium straight out of the box.