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2021 Yamaha WR450F
2021 Yamaha WR450F

Specs

General Information

Manufacturer
Yamaha
Yamaha
Model Year
2021
2021
Model
WR450F
WR450F
Model Code
WR450FM
WR450FM
Color
Team Yamaha Blue
Team Yamaha Blue

Brakes/Wheels/Tires

Brakes

Front - 270 mm hydraulic single disc

Rear - 245 mm hydraulic single disc

Front - 270 mm hydraulic single disc

Rear - 245 mm hydraulic single disc

Tires

Front - 80 / 100-21 Dunlop® MX33

Rear - 120 / 90-18 Dunlop® MX33

Front - 80 / 100-21 Dunlop® MX33

Rear - 120 / 90-18 Dunlop® MX33

Dimensions

Length
85.6 in.
85.6 in.
Height
50 in.
50 in.
Width
32.5 in.
32.5 in.
Weight
Wet - 262 lb.
Wet - 262 lb.
Ground Clearance
Maximum - 12.6 in.
Maximum - 12.6 in.
Wheelbase
58.3 in.
58.3 in.
Seat Height
37.6 in.
37.6 in.

Drivetrain

Transmission
Wide-ratio 5-speed
Wide-ratio 5-speed
Final Drive
O-ring chain
O-ring chain

Engine

Engine
4-stroke, DOHC; 4 valves
4-stroke, DOHC; 4 valves
Cooling
Liquid
Liquid
Displacement
450 cc
450 cc
Bore x Stroke
97 x 60.8 mm
97 x 60.8 mm
Compression Ratio
13.0:1
13.0:1
Clutch
Wet multiplate
Wet multiplate
Fuel System
Mikuni® fuel injection, 44 mm
Mikuni® fuel injection, 44 mm
Fuel Capacity
2.15 gal.
2.15 gal.

Operational

Frame
Aluminum
Aluminum
Front Suspension
KYB® Speed-Sensitive System inverted fork; fully adjustable, 12.2 in. travel
KYB® Speed-Sensitive System inverted fork; fully adjustable, 12.2 in. travel
Rear Suspension
KYB® single shock; fully adjustable, 12.5 in. travel
KYB® single shock; fully adjustable, 12.5 in. travel
Rake
Caster angle - 27°
Caster angle - 27°
Trail
4.6 in.
4.6 in.

Other

Warranty
30 Day (Limited Factory)
30 Day (Limited Factory)

Features

New For 2021

  • CYLINDER HEAD: The WR450F's already potent engine was treated to a host of go-fast refinements, including 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 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.
  • BRAKING SYSTEMS: More rigid front caliper with pads and disc boost brake feel and controllability. The front brake rotor dissipates heat more efficiently, for more consistent performance under racing conditions.

New For 2021

  • CYLINDER HEAD: The WR450F's already potent engine was treated to a host of go-fast refinements, including 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 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.
  • BRAKING SYSTEMS: More rigid front caliper with pads and disc boost brake feel and controllability. The front brake rotor dissipates heat more efficiently, for more consistent performance under racing conditions.