Motocross Bikes
2021Yamaha YZ450FSP
37 fields on record
The 2021 Yamaha YZ450FSP is a competition-focused motocross machine built for serious amateur and professional riders seeking maximum performance. Powered by a 449cc liquid-cooled four-stroke engine with titanium valves and aggressive 13.0:1 compression, it delivers strong power delivery across the rev range. Known for its responsive handling and reliable Mikuni fuel injection, this bike excels in both amateur racing and training environments.
- Capacity
- 449.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Wet weight
- 111.0 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 closed-course motocross racing at the highest level, not for general riding.
- Built for
- Aggressive, razor-sharp, and race-tuned, with explosive throttle response and suspension designed for jumps and rough terrain rather than smoothness.
- Not ideal for
- Not suitable for commuting, road riding, touring, carrying a passenger, or riders seeking comfort and low-maintenance ownership.
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)
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.5045 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
- Clutch
- Multiplate wet clutch
Dimensions & weight
- Wheelbase
- 1481 mm
- Overall length
- 2185 mm
- Overall width
- 825 mm
- Overall height
- 1275 mm
- Seat height
- 965 mm
- Wet weight
- 111.0 kg
- Fuel capacity
- 6.20 litres
- Ground clearance
- 330 mm
- 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
- 317 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
- Monster Energy Yamaha Racing Edition
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
Rider Reviews
Common questions
What is the engine size of the Yamaha YZ450FSP?
The 2021 Yamaha YZ450FSP has a Capacity of 449.0 ccm (27.40 cubic inches).
What engine power does the Yamaha YZ450FSP have?
The 2021 Yamaha YZ450FSP has a Power of 56.0 HP (41.2 kW).
How many gears does the Yamaha YZ450FSP have?
The 2021 Yamaha YZ450FSP has a Gearbox of 5-speed.
How much does the Yamaha YZ450FSP weigh?
The 2021 Yamaha YZ450FSP has a Wet weight of 111.0 kg (244.7 pounds).
Shop this bike
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The 2021 Yamaha YZ450FSP is an impressive off-road motorcycle that delivers exceptional performance and handling. With its powerful 450cc engine and advanced suspension system, this bike offers a thrilling riding experience for enthusiasts. The lightweight design and ergonomic layout make it easy to maneuver through various terrains, while the responsive throttle ensures smooth acceleration and precise control. Whether you're a seasoned rider or a beginner looking to tackle challenging trails, the YZ450FSP is a top choice for anyone seeking a reliable and capable off-road machine.
In addition to its impressive performance, the 2021 Yamaha YZ450FSP boasts a sleek and modern design that is sure to turn heads on the trails. The stylish bodywork and aggressive color scheme give this bike a bold and athletic appearance, while the durable construction and high-quality components ensure long-lasting reliability. With its cutting-edge technology and attention to detail, the YZ450FSP is a standout option in the competitive off-road motorcycle market. If you're in the market for a high-performance off-road bike that offers an exhilarating ride and eye-catching aesthetics, the 2021 Yamaha YZ450FSP is definitely worth considering.
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