2021 Yamaha WR450F Guide

2021 Yamaha WR450F : GO FASTER. TURN EASIER. STOP QUICKER.

Introducing the new 2021 Yamaha WR450F…

Featuring a new more powerful, user‑friendly engine and an updated frame, this off‑road bike offers enhanced performance for aggressive enduro riding.

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.

The all-new WR450F is the fastest and most agile large capacity enduro bike ever produced by Yamaha. Using the highly-advanced engine and chassis technology from the latest YZ450F motocross bike – and equipped with specially-developed enduro settings – this proven winner is born to ride.

Born to ride.
Yamaha’s engineers have taken the compact and lightweight engine from the latest YZ450F and developed an all-new powerplant for the new generation WR450F. Featuring a ‘made-to-measure’ ECU as well as an enduro-specific high-compression cylinder head and a specially designed heavy-duty transmission, providing this new enduro bike with full winning performance. While the fine-tuned rigidity balance of the new lighter aluminium beam frame combined with best-in-class suspension and uprated brakes give you increased manoeuvrability and enhanced feeling with the track surface.

Yamaha’s digital Power Tuner and handlebar-mounted engine mode switch put you in total control when surface and weather conditions change – and the compact new instruments give you all the information you need to keep ahead. Finished in a dynamic new Icon Blue, the completely redesigned WR450F is ready for any battle.

Go faster. Turn easier. Stop quicker.

The enduro world is evolving. And to make it to the podium you need a new kind of dirt bike that combines the hard-hitting performance of a motocross machine with all-day useability and precise control.

Developed from the latest generation YZ450F, the all-new WR450F is built to deliver, and ready to win.

Fire up the compact and lightweight new 450cc engine and you’ll experience significantly increased levels of power and torque from the second you get moving – while the new lighter aluminium beam frame and class-leading suspension give you lightweight manoeuvrability, added stability and easy cornering.

The rigidity balance of the new lighter aluminium beam frame is finely tuned to give a higher level of feedback on various types of terrain – while the best-in-class suspension and uprated brakes mean that you can maximise the winning potential of the more powerful engine. All-new WR450F: Born to ride.

New lighter and more powerful 450cc engine
The all-new WR450F is equipped with Yamaha’s most sophisticated Off Road Competition engine from the latest generation YZ450F motocross model. Significantly lighter and more powerful at all engine speeds, this lightweight and compact new powerplant runs with an enduro-specific ECU to deliver a wide spread of winning performance.

New cylinder head and piston design
The all-new high compression cylinder head with new piston design is lighter and more compact than ever thanks to the repositioning of the camshafts. Featuring revised intake and exhaust port angles and equipped with lightweight magnesium covers, this new high-efficiency head gives stronger power at all revs and contributes towards the new model’s enhanced mass centralisation.

New lighter aluminium frame for sharper handling
The all-new WR450F is equipped with the latest generation YZ450F aluminium bilateral beam frame that has been retuned for enduro. Manufactured with thinner main spars and thicker bottom tubes – as well as specially developed engine plates – this new frame gives improved feedback over bumps together with an enhanced feeling of connectivity with the track surface.

Industry-leading suspension systems
The industry-leading speed sensitive front forks are the same design as used on the YZ450F and feature special enduro-specific settings and full adjustability – enabling you to fully exploit the increased engine performance. The lightweight link-type rear end also uses special enduro settings to give excellent traction with outstanding bump absorption.

Yamaha Power Tuner for easy smartphone tuning
The WR450F pioneered the use of advanced digital technology by being the first enduro bike to feature onboard connectivity that enabled remote wireless engine tuning. Simply download the free app to your smartphone and you’ll be able to make instant changes to the fuel/air mix and ignition timing to suit the track conditions and weather – without even opening your toolbox.

Handlebar-mounted mapping switch
Whether you’re racing or having fun on the trail, surface conditions and weather can change throughout the day. Pre-loaded with two maps, the handlebar-mounted mapping switch means that you can instantly select a different engine running mode while on the move.

2021 Yamaha WR450F Totalmotorcycle.com Key Features

NEW 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
• 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

• All-New Cylinder Head
  The WR450F’s already potent engine was treated to a host of go-fast refinements, including new combustion chamber geometry with steeper valve angles, more aggressive cam profiles, a higher compression piston with low friction rings, longer connection rod, larger exhaust head pipe connector, a high flow air filter, more efficient breather system and more—all while fitting under a smaller and lighter magnesium valve cover.
• Revised Bilateral Beam Frame
  The WR450F aluminum frame features all-new flex characteristics that give riders the ultimate combination of precise cornering performance, traction and bump stability. By tuning the rigidity balance of the chassis with changes to the lateral beams and engine cradle tube thickness as well as engine mounts, top triple clamp and front axle, the 2021 WR450F takes rider confidence to new levels.
• Updated Suspension Tuning
  The 2021 WR450F features revised front and rear damping tuned in concert with the updated chassis to improve cornering performance, traction and bump absorption. With smoother chassis movement, the rider is able to make the most of the engine’s exceptional power with greater confidence.
• New Braking Systems
  A new, more rigid front caliper with new pads and disc boost brake feel and controllability. The front brake rotor dissipates heat more efficiently, for more consistent performance under racing conditions.

2021 Yamaha WR450F Totalmotorcycle.com Features and Benefits

ENGINE

Rearward-Slanted Cylinder Design
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.

Engine Tuned for Enduro
WR450F-specfic ignition and fuel injection maps are optimized for enduro riding and racing featuring longer and stronger pulling power with increased controllability.

Unique Intake and Exhaust Systems
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.

High-Capacity Radiator
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.

Electric Starter System
The WR450F features a compact electric starter system to simplify restarts on the trail and add convenience everywhere else.

Advanced Fuel Injection
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.

Robust Transmission and Clutch
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

YZ450FX-Derived Bilateral Beam Frame
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.

Compact Body and Seat Design
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.

Class-Leading Suspension
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.

Enduro Wheels and Tires
The WR450F features an 18-inch rear wheel to help prevent pinch flats and provide additional comfort across rough terrain.

ADDITIONAL FEATURES

Compact Headlight Unit
The WR450F’s headlight fairing and compact taillight unit centralize mass and improve the racy, agile styling of the machine.

New Lighter Footpegs
Chromoly steel pegs from the YZ450F are 70 grams lighter than previous versions.

Large Composite Engine Guard
Offers full coverage including radiator hose protection.

Embedded Graphics
Yamaha’s unique embedded graphics are built into the bodywork for extended durability, resisting both peeling and damage.

2021 Yamaha WR450F – Totalmotorcycle.com USA Specifications/Technical Details
US MSRP Price: $9799 USD
Canada MSRP Price: Starting at $11199 CDN
Europe/UK MSRP Price: £  GBP (On The Road inc 20% Vat)

Engine Type 450cc liquid-cooled DOHC 4-stroke; 4 valves
Bore x Stroke 97.0mm × 60.8mm
Compression Ratio 13.0:1
Fuel Delivery Mikuni® fuel injection, 44mm
Transmission Wide-ratio 5-speed; wet multiplate clutch
Final Drive O-ring chain
Suspension / Front KYB® Speed-Sensitive System inverted fork;
fully adjustable, 12.2-in travel
Suspension / Rear KYB® single shock; fully adjustable, 12.5-in
travel
Brakes / Front Hydraulic single disc brake, 270mm
Brakes / Rear Hydraulic single disc brake, 245mm
Tires / Front 80/100-21 Dunlop® MX33
Tires / Rear 120/90-18 Dunlop® MX33
L x W x H 85.6 in x 32.5 in x 50.0 in
Seat Height 37.6 in
Wheelbase 58.3 in
Rake (Caster Angle) 27.0°
Trail 4.6 in
Maximum Ground
Clearance
12.6 in
Fuel Capacity 2.15 gal
Wet Weight 262 lb
Warranty 30 Day (Limited Factory Warranty)
Color Team Yamaha Blue

2021 Yamaha WR450F – Totalmotorcycle.com Canada Specifications/Technical Details

ENGINE

CHASSIS

CRITICAL DATA

2021 Yamaha WR450F – Totalmotorcycle.com European Specifications/Technical Details

Engine
Engine type Liquid-cooled;4-stroke;4-valves;DOHC
Displacement 450cc
Bore x stroke 97.0 mm x 60.8 mm
Compression ratio 13.0 : 1
Maximum power –
Maximum torque –
Lubrication system Wet sump
Clutch type Wet;Multiple Disc
Ignition system TCI
Starter system Electric
Transmission system Constant Mesh;5-speed
Final transmission Chain
Fuel system Fuel Injection
Chassis
Frame Semi double cradle
Caster angle 27º10
Trail 116 mm
Front suspension system Telescopic forks
Rear suspension system Swingarm;(link suspension)
Front travel 310 mm
Rear travel 317 mm
Front brake Hydraulic single disc, Ø270 mm
Rear brake Hydraulic single disc, Ø245 mm
Front tyre 90/90-21 54M
Rear tyre 130/90-18 69M
Dimensions
Overall length 2,175 mm
Overall width 825 mm
Overall height 1,270 mm
Seat height 955 mm
Wheel base 1,480 mm
Minimum ground clearance 320 mm
Wet weight (including full oil and fuel tank) 119 kg
Fuel tank capacity 7.9 litres
Oil tank capacity 0.90 litres

The 2021 WR450F and WR250F will be only be available in race specification, for usage on closed circuits, private areas and specific events where participation with non-registered vehicles is allowed. Always
wear a helmet, eye protection and protective clothing. Yamaha encourages you to ride safely and respect fellow riders and the environment. Images displayed may depict a professional rider performing under
controlled conditions or on a closed circuit. The unit displayed on the images may be equipped with genuine Yamaha accessories and/or non-Yamaha branded accessories which may be for closed-circuit use
only. All information is given for general guidance. Specifications and appearance

Manufacturer Specifications and appearance are subject to change without prior notice on Total Motorcycle (TMW).