2021 Yamaha YZ450FX Guide

2021 Yamaha YZ450FX : POWER, TUNED TO PERFECTION.

2021 Yamaha YZ450FX:

Featuring a new, more powerful engine, an updated frame, and the smartphone Power Tuner app to dial‑in the bike’s settings to fit your style and conditions.

Featuring a new, more powerful engine, an updated frame, and the smartphone Power Tuner app to dial in the bike’s settings to your style and conditions, the 2021 YZ450FX is power – tuned to perfection. Developed from the newest YZ450F motocross model, the 2021 YZ450FX includes added features and unique settings that make it the ultimate woods racer.

2021 Yamaha YZ450FX Totalmotorcycle.com Key Features

New for 2021

• All-New Cylinder Head
  The YZ450FX’s already potent motor 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 YZ450FX 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 YZ450FX takes rider confidence to new levels.
• Updated Suspension Tuning
  The 2021 YZ450FX 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 and compact rear caliper work with new pads and discs to boost brake feel and controllability. The new 240mm rear brake rotor dissipates heat more efficiently, for more consistent performance under racing conditions.

• YZ450F™-Based GNCC® and 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 free of charge and industry-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. Map 1 provides more responsive, quicker revving engine characteristics while Map 2 provides smoother response, slower revving characteristics for when traction is limited.
• 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.

Yamaha Announces 2021 YZ Cross Country Motorcycles
Yamaha’s Redesigned YZ450FX Features Engine, Frame and Suspension Updates

Yamaha Motor Corporation, USA, is announcing its 2021 YZ cross country models including a redesigned 2021 YZ450FX. Designed to beat the competition in Hare Scrambles and Grand National Cross Country (GNCC®) races, the newest YZ450FX features a refined, more efficient engine, a redesigned frame with all-new flex characteristics, updated suspension settings, and more.

“Yamaha’s cross country lineup builds on the unmatched success of our motocross designs, using industry-leading technology to provide uncompromised performance for cross country competition,” said Derek Brooks, Yamaha Motorsports Motorcycle Product Line Manager. “The newly redesigned YZ450FX provides a lighter, more powerful, and better handling off-road experience for both cross country racers and recreational riders alike.”

The return of the two-stroke YZ125X and YZ250X models and four-stroke YZ250FX completes the 2021 YZ cross country lineup. All models will feature a next-generation Team Yamaha Blue color and graphic scheme to further accentuate the advances of the YZ series.

Welcome to the victorYZone
Yamaha’s off-road competition bikes offer the very latest in technology with performance features designed to help racing enthusiasts reach their maximum potential, win races, and stand on top of the podium.

New 2021 YZ450FX: Cross Country Domination
The 2021 YZ450FX is designed to beat the cross country competition. The new 449cc, liquid-cooled, four-stroke, electric start engine features an all-new compact cylinder head with redesigned combustion chamber shape, and steeper valve angles. The rearward-slanted cylinder houses a higher compression piston with low friction rings attached to a longer connecting rod. The wide ratio, 5-speed transmission has been refined to provide smoother shifting, and a more efficient crankcase breather system has been adopted to decrease pumping losses. In all, the lighter, more compact engine produces increased power across the entire RPM range for stronger and more linear pulling power.

The latest evolution of Yamaha’s lightweight aluminum bilateral beam frame has been redesigned with all-new flex characteristics that provide improved cornering performance, traction and bump reaction to give the rider more confidence to push harder in any off-road condition. Other chassis components such as engine mounts, top triple clamp and front axle, as well as the class-leading KYB® suspension with enhanced compression and rebound characteristics were carefully refined to reduce weight while improving handling and performance. To bring the new package to a stop, the 2021 YZ450FX features a newly designed front brake caliper, brake pads and front and rear disc. The combined changes to the new 2021 YZ450FX deliver increased power output with more controllable, linear acceleration and lightweight handling characteristics that mimic the YZ250FX.

To further showcase the YZ450FX’s cross country edge, electric start, a lightweight lithium battery, and advanced fuel injection are all standard features. The front-positioned intake and rear-positioned exhaust layout deliver the widest spread of reliable power while balancing the weight for excellent mass centralization. This cross country machine also continues to feature Yamaha’s advanced racing technology. The dual-mode switchable engine mapping and wireless connectivity is handled through the industry’s only free-of-charge complete tuning system, highlighted by the Yamaha Power Tuner App, which allows racers to adjust their engine performance right from their phone. With new next-generation Team Yamaha Blue colors and graphics, the 2021 YZ450FX showcases Yamaha’s cross country competitive edge.

2021 YZ250FX: Your Power, Your Way
Yamaha’s winning design returns with the 2021 YZ250FX. With its revolutionary front-intake, rear-exhaust, liquid-cooled, DOHC 4-stroke power plant, added sixth gear, and wide ratio transmission, this is the weapon of choice for cross country racing. The aluminum bilateral beam frame, and industry leading KYB suspension of the 2021 YZ250FX provide the ultimate balance of race-winning performance, rideability and comfort.

With electric start, a 2.16-gallon fuel tank, rugged plastic skid plate, sealed O-ring chain and 18-inch rear wheel, the YZ250FX is ready to win right out of the box. The bike also feature’s Yamaha’s free-of-charge complete tuning system, highlighted by the Yamaha Power Tuner App. With the ability to make fueling and ignition timing changes and choose between two user-defined ECU maps through the handlebar-mounted dual-mode switch, the YZ250FX is equipped for on-track, wireless performance adjustments.

2021 YZ125X and YZ250X
The two-stroke YZ125X and YZ250X are back for 2021. Optimized for the unique demands of cross country racing, the YZ125X and YZ250X feature the Yamaha Power Valve System with six-speed and wide ratio five-speed transmissions, respectively, for the ultimate cross country power plant. Their lightweight aluminum frame hosts the industry-leading fully adjustable, KYB speed sensitive spring-type suspension that is tuned specifically for cross country races. The 18-inch rear wheel, sealed O-ring chain, and off-road focused tires, coupled with the aggressive styling, ready the YZ125X and YZ250X for GNCC racing.

Yamaha bLU cRU Off-Road Racing Contingency Program
All 2021 YZ models are eligible for Yamaha’s current 2020 bLU cRU Off-Road Racing Contingency Program, which features nearly $5 million for Yamaha bLU cRU riders competing in off-road motorcycle racing. YZ riders can earn contingency payouts via a bLU cRU debit card, receive a 10 percent rebate on GYTR parts and accessory purchases of up to $1,000, and receive an instant $45 credit

2021 Yamaha YZ450FX Totalmotorcycle.com Features and Benefits

• 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
  The free of charge and industry-exclusive Yamaha Power Tuner app 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.

• Aluminum Frame
  The 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
  The 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 with both front and rear system settings for optimal GNCC® performance.
• 270mm Front Brake
  Large 270mm front disc brake coupled with aggressive pad material offer 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.

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

2021 Yamaha YZ450FX – Totalmotorcycle.com USA Specifications/Technical Details
US MSRP Price: $9699 USD
Canada MSRP Price: Starting at $10,899 CDN
Europe/UK MSRP Price: £ See Dealer GBP (On The Road inc 20% Vat)

Engine Type 449cc 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
Suspension / Front KYB® spring-type fork with speed sensitive
damping; fully adjustable, 12.2-in travel
Suspension / Rear KYB® single shock; fully adjustable, 12.5-in
travel
Brakes / Front Hydraulic disc, 270mm
Brakes / Rear Hydraulic disc, 245mm
Tires / Front 80/100-21 Dunlop® MX3S
®
Tires / Rear 120/90-18 Dunlop® MX3S
®
L x W x H 85.6 in x 32.5 in x 50.4 in
Seat Height 37.6 in
Wheelbase 58.3 in
Rake (Caster Angle) 27°
Trail 4.6 in
Maximum Ground
Clearance
12.6 in
Fuel Capacity 2.2 gal
Wet Weight 254 lb
Warranty 30 Day (Limited Factory Warranty)
Color Team Yamaha Blue

2021 Yamaha YZ450FX – Totalmotorcycle.com Canada Specifications/Technical Details

ENGINE

CHASSIS

CRITICAL DATA

2021 Yamaha YZ450FX – Totalmotorcycle.com European Specifications/Technical Details

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