Motocross Bikes
2020Yamaha YZ450FX
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The 2020 Yamaha YZ450 FX is a hard-hitting 450cc four-stroke enduro bike engineered for serious off-road riders seeking maximum performance and reliability on demanding terrain. Its potent single-cylinder engine with titanium valves and Mikuni fuel injection delivers strong power delivery, while the liquid-cooled DOHC design ensures durability during extended trail and cross-country riding. Best known for its aggressive performance and handling versatility, it suits experienced riders tackling extreme enduro courses and technical off-road challenges.
- Capacity
- 449.7 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Wet weight
- 116.1 kg
- Seat height
- 965 mm
- Power
- 45.0 HP (33.1 kW)
What’s new for the 2020 Yamaha YZ450FX
vs the 2019| Spec | 2019 | 2020 |
|---|---|---|
| Power | 50.0 HP (36.8 kW) | 45.0 HP (33.1 kW) |
| Torque | 44.2 Nm (4.5 kgf-m or 32.6 ft.lbs) @ 7330 RPM | not listed |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built for off-road and motocross-style riding on tracks and closed terrain rather than public roads.
- Built for
- A motocross bike from Yamaha with a 450cc engine; its character is versatile and engaging.
- Not ideal for
- Not road-legal in most markets and not for commuting or touring.
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
- 449.7 ccm
- Power
- 45.0 HP (33.1 kW)
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.3876 HP/kg (wet)
- Bore x stroke
- 97.0 x 60.9 mm
- Compression
- 12.8:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- TCI
- Valves per cylinder
- 4
- Lubrication system
- Wet sump
- Torque
- Not on record - add it
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet multi-disc
Dimensions & weight
- Wheelbase
- 1481 mm
- Overall length
- 2174 mm
- Overall width
- 826 mm
- Overall height
- 1270 mm
- Seat height
- 965 mm
- Wet weight
- 116.1 kg
- Fuel capacity
- 8.30 litres
- Ground clearance
- 335 mm
- Dry weight
- Not on record - add it
Chassis & suspension
- Frame
- Aluminum Bilateral Beam frame
- Front suspension
- KYB® spring-type fork with speed sensitive damping; fully adjustable
- Rear suspension
- KYB® single shock; full adjustable
- Front wheel travel
- 310 mm
- Rear wheel travel
- 318 mm
- Rake (fork angle)
- 27.2°
- Trail
- 117 mm
Brakes & wheels
- Front brakes
- Single disc. Hydraulic
- Front brakes diameter
- 270 mm
- Rear brakes
- Single disc. Hydraulic
- Rear brakes diameter
- 245 mm
- Front tyre
- 80/100-21
- Rear tyre
- 120/90-18
Other
- Color options
- Team Yamaha Blue
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 | 2016 | 2019 | 2020 | 2022 | 2024 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 450 cc | 450 cc | 450 cc | 450 cc | 450 cc | 450 cc |
| Seat height | 965 mm | 965 mm | 965 mm | 955 mm | 955 mm | 955 mm |
| Fuel capacity | 7.6 L | 8.3 L | 8.3 L | 8.3 L | 8.3 L | 7.9 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 YZ450FX?
The 2020 Yamaha YZ450FX has a Capacity of 449.7 ccm (27.44 cubic inches).
What engine power does the Yamaha YZ450FX have?
The 2020 Yamaha YZ450FX has a Power of 45.0 HP (33.1 kW).
How many gears does the Yamaha YZ450FX have?
The 2020 Yamaha YZ450FX has a Gearbox of 5-speed.
How much does the Yamaha YZ450FX weigh?
The 2020 Yamaha YZ450FX has a Wet weight of 116.1 kg (256.0 pounds).
Shop this bike
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The 2020 Yamaha YZ450 FX motorcycle is a versatile and powerful off-road machine that delivers impressive performance. With its 450cc engine, this bike has plenty of power to tackle any terrain, from tight trails to open desert. The lightweight frame and agile handling make it easy to maneuver, while the advanced suspension system provides a smooth and controlled ride. The YZ450 FX also features a convenient electric start and a six-speed transmission for optimal versatility. Overall, this Yamaha motorcycle is a top choice for riders who want a high-performance bike that can handle the demands of off-road riding.
If you're in the market for a high-performance off-road motorcycle, the 2020 Yamaha YZ450 FX is worth considering. Its powerful 450cc engine, lightweight frame, and advanced suspension system make it a top choice for riders who want a bike that can handle any terrain. With convenient features like electric start and a six-speed transmission, this Yamaha motorcycle offers both power and versatility. Whether you're hitting the trails or taking on the open desert, the YZ450 FX is a reliable and capable off-road machine that delivers impressive performance.
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