| The all-new WR450F features increased competitiveness based on the flagship YZ450F motocross racer - with added features and unique settings designed to optimize the WR for enduro riding. |
HIGHLIGHTS |
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Specific ignition and fuel injection maps are optimized for enduro riding and racing, featuring longer and stronger pulling power with increased controllability. The new chassis has been tuned for enduro riding by using WR-specific engine mounts. An 18-inch rear wheel and tires, large 7.9-litre fuel tank, radiator fan, sealed O-ring chain, steel rear sprocket and a high-mounted aluminum side stand are additionally designed specifically for the rigours of the enduro environment. |
Features & Benefits |
Key FeaturesNEW FOR 2021 - Lighter, more compact cylinder head with raised compression ratio - New engine internals including high power piston with concave shape - New intake port shape and intake/exhaust valve angles for high power with increased control - New ECU settings to match new engine - New tougher gearbox - New suspension settings to match frame/engine - New bilateral beam frame and engine mounts for precise handling - Lighter and stronger front end for increased traction in corners and rider feedback - Lighter footpegs - Lighter, more powerful braking system - Lighter multifunction display - New colour and graphics
KEY FEATURES - Based on latest-gen YZ450F motocross model - New engine designed for stronger, longer pulling power and excellent controllability - New bilateral beam frame, engine mounts and suspension settings - Enduro-focused components and specifications - Headlight and taillight |
Engine
The WR450F’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. Updates made to the latest-gen YZ450F MX racer have been carried over to the WR450F including a lighter, more compact cylinder head, aggressive cam profiles and high-compression box bridge piston design with DLC-coated piston pin.
WR450F-specfic ignition and fuel injection maps are optimized for enduro riding and racing featuring longer and stronger pulling power with increased controllability.
The WR450F features a two-piece air filter that works in conjunction with the tuned intake tract length and a WR-specific muffler to boost the linear feeling of traction and drive. The WR450F muffler is completely mechanical, eliminating the need to repack.
The WR450F uses a large radiator with excellent cooling capacity shared with the YZ450F motocrosser, complete with a cooling fan for consistent performance during the toughest enduro rides.
The WR450F features a compact electric starter system to simplify restarts on the trail and add convenience everywhere else.
The engine breathes through a 44 mm Mikuni throttle body fed by a high-pressure electric pump to ensure optimum fuel atomization and power for a wide range of riding elevations and conditions.
The WR450F’s wide-ratio 5-speed transmission provides the optimized gear for tight technical terrain as well as wide-open fire roads. The clutch system has a light pull with specific heat-resistant friction plates for tough enduro competition. |
Chassis / Suspension
Yamaha’s refined aluminum frame provides high performance on technical, aggressive terrain sections as well as comfort for those long days in the saddle. Frame spars and engine mounts have been developed alongside the YZ450FX cross country racer to centralize mass for the best possible balance of bump absorption, stiffness and lightweight feeling.
The WR450F features stylish bodywork from tip to tail, including a large 7.9-litre, mass-centralized fuel tank. The body design is narrow for more comfortable knee grip and control feeling while the seat gives the rider additional room to move aboard the machine. Even the rear fender is designed for added rigidity to make moving the machine easier.
The WR450F’s industry-leading, fully adjustable KYB coil spring-type fork with speed sensitive damping provides exceptional balance between handling and bump absorption. Settings are specifically tuned for enduro and to match the new frame.
The WR450F features an 18-inch rear wheel to help prevent pinch flats and provide additional comfort across rough terrain. |
ADDITIONAL FEATURES
The WR450F’s headlight fairing and compact taillight unit centralize mass and improve the racy, agile styling of the machine.
Chromoly steel pegs from the YZ450F are 70 grams lighter than previous versions.
Offers full coverage including radiator hose protection.
Yamaha’s unique embedded graphics are built into the bodywork for extended durability, resisting both peeling and damage. |
ENGINE PERFORMANCE
ADVANCED CHASSIS
BUILT FOR ENDURO ACTION
