Motocross Bikes
2021Yamaha YZ450F Monster Energy
41 fields on record
The 2021 Yamaha YZ450F Monster Energy is a competitive motocross bike designed for intermediate to advanced riders seeking a potent 449cc four-stroke powerplant. Known for its aggressive power delivery and agile handling, this machine excels in both track racing and off-road environments with its liquid-cooled engine, titanium valves, and responsive fuel injection system.
- Capacity
- 449.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Wet weight
- 111.1 kg
- Seat height
- 965 mm
- Power
- 56.0 HP (41.2 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for motocross racing and serious off-road riding, not for street use or commuting.
- Built for
- A razor-sharp, high-revving 450cc single with titanium valves and fully adjustable KYB suspension, designed to be thrown around berms and jumps with total precision.
- Not ideal for
- Not for beginners, commuters, passengers, or anyone wanting comfort, storage, or highway capability.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 449.0 ccm
- Power
- 56.0 HP (41.2 kW)
- Torque
- 44.3 Nm (4.5 kgf-m) @ 7400 RPM
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.5041 HP/kg (wet)
- Bore x stroke
- 97.0 x 60.9 mm
- Compression
- 13.0:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- TCI
- Valves per cylinder
- 4
- Lubrication system
- Wet sump
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Multiplate wet clutch
Dimensions & weight
- Wheelbase
- 1486 mm
- Overall length
- 2184 mm
- Overall width
- 826 mm
- Overall height
- 1275 mm
- Seat height
- 965 mm
- Wet weight
- 111.1 kg
- Fuel capacity
- 6.10 litres
- Ground clearance
- 330 mm
- Oil capacity
- 1.00 litres
- Dry weight
- Not on record - add it
Chassis & suspension
- Frame
- Bilateral beam frame, aluminum
- Front suspension
- KYB Speed-Sensitive System, inverted fork: fully adjustable
- Rear suspension
- KYB® single shock; fully adjustable
- Front wheel travel
- 310 mm
- Rear wheel travel
- 318 mm
- Rake (fork angle)
- 27.0°
- Trail
- 119 mm
Brakes & wheels
- Front brakes
- Single disc. Hydraulic.
- Front brakes diameter
- 270 mm
- Rear brakes
- Single disc. Hydraulic.
- Front tyre
- 80/100-21
- Rear tyre
- 120/80-19
Other
- Color options
- Team Yamaha Blue/green
- Comments
- Special Monster Energy Yamaha Racing Edition. Launch control. Power Tuner via smartphone. Torque is a rear-wheel dyno figure.
Specs last verified against published sources: .
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2021 | 2023 | 2024 | 2026 | 2027 |
|---|---|---|---|---|---|
| Capacity | 449 cc | 449 cc | 449 cc | 450 cc | 450 cc |
| Dry weight | — | — | — | — | 99 kg |
| Seat height | 965 mm | 965 mm | 965 mm | 965 mm | 965 mm |
| Fuel capacity | 6.1 L | 6.1 L | 6.1 L | 6.1 L | 6.1 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Yamaha YZ450F Monster Energy?
The 2021 Yamaha YZ450F Monster Energy has a Capacity of 449.0 ccm (27.40 cubic inches).
What engine power does the Yamaha YZ450F Monster Energy have?
The 2021 Yamaha YZ450F Monster Energy has a Power of 56.0 HP (41.2 kW).
How many gears does the Yamaha YZ450F Monster Energy have?
The 2021 Yamaha YZ450F Monster Energy has a Gearbox of 5-speed.
What is the torque of the Yamaha YZ450F Monster Energy?
The 2021 Yamaha YZ450F Monster Energy has a Torque of 44.3 Nm (4.5 kgf-m or 32.7 ft.lbs) @ 7400 RPM.
How much does the Yamaha YZ450F Monster Energy weigh?
The 2021 Yamaha YZ450F Monster Energy has a Wet weight of 111.1 kg (244.9 pounds).
Shop this bike
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The 2021 Yamaha YZ450F Monster Energy motorcycle is an impressive machine that delivers top-notch performance for motocross enthusiasts. With its powerful 450cc engine, lightweight chassis, and advanced suspension system, this bike offers excellent handling and agility on the track. The Monster Energy graphics give it a sharp and aggressive look, while the high-quality components ensure a smooth and comfortable ride. Whether you're a seasoned rider or a beginner, this Yamaha YZ450F is an excellent choice for anyone looking for a competitive and reliable motocross bike.
Overall, the 2021 Yamaha YZ450F Monster Energy motorcycle is a top contender in the motocross market. Its combination of power, agility, and striking design make it a standout choice for riders who want to make a statement on the track. With its high-performance features and durable construction, this bike is sure to impress both casual riders and serious motocross enthusiasts alike. If you're looking for a reliable and competitive motocross machine, the Yamaha YZ450F Monster Energy is definitely worth considering.
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