Motocross Bikes
2025Yamaha YZ450FX
40 fields on record
The 2025 Yamaha YZ450FX is a competition-focused enduro bike engineered for serious off-road riders seeking reliability and performance. Its potent 450cc liquid-cooled single-cylinder four-stroke engine delivers responsive power across varied terrain, while the proven five-speed transmission and durable chassis provide the control needed for technical riding. Best known for balancing aggressive trail capability with user-friendly ergonomics, the YZ450FX excels in enduro racing and demanding off-road adventures.
- Capacity
- 450.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Wet weight
- 113.9 kg
- Seat height
- 955 mm
- Power
- 50.0 HP (36.8 kW)
What’s new for the 2025 Yamaha YZ450FX
vs the 2024| Spec | 2024 | 2025 |
|---|---|---|
| Wet weight | 115.2 kg (254.0 pounds) | 113.9 kg (251.1 pounds) |
| Fuel capacity | 8.30 litres (2.19 US gallons) | 8.00 litres (2.11 US gallons) |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built for closed-course cross-country and enduro-style off-road riding rather than street use or commuting.
- Built for
- A high-revving, race-derived thumper that rewards an aggressive, momentum-focused riding style with sharp handling and light overall mass.
- Not ideal for
- Not a good fit for new riders, passengers, highway commuting, or anyone wanting plush comfort and long-range touring 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
- 450.0 ccm
- Power
- 50.0 HP (36.8 kW)
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.4390 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
- Wet multi-disc
Dimensions & weight
- Wheelbase
- 1471 mm
- Overall length
- 2169 mm
- Overall width
- 826 mm
- Overall height
- 1265 mm
- Seat height
- 955 mm
- Wet weight
- 113.9 kg
- Fuel capacity
- 8.00 litres
- Ground clearance
- 330 mm
- Dry weight
- Not on record - add it
Chassis & suspension
- Frame
- Aluminum Bilateral Beam
- Front suspension
- KYB® spring-type fork with speed sensitive damping; fully adjustable
- Rear suspension
- KYB® single shock; full adjustable
- Front wheel travel
- 300 mm
- Rear wheel travel
- 305 mm
- Rake (fork angle)
- 27.0°
- Trail
- 122 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
- Comments
- Traction control. Ride modes. Yamaha Power Tuner App.
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 | 2022 | 2024 | 2025 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 450 cc | 450 cc | 450 cc | 450 cc | 450 cc | 450 cc |
| Seat height | 965 mm | 965 mm | 955 mm | 955 mm | 955 mm | 955 mm |
| Fuel capacity | 7.6 L | 8.3 L | 8.3 L | 8.3 L | 8 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 2025 Yamaha YZ450FX has a Capacity of 450.0 ccm (27.46 cubic inches).
What engine power does the Yamaha YZ450FX have?
The 2025 Yamaha YZ450FX has a Power of 50.0 HP (36.8 kW).
How many gears does the Yamaha YZ450FX have?
The 2025 Yamaha YZ450FX has a Gearbox of 5-speed.
How much does the Yamaha YZ450FX weigh?
The 2025 Yamaha YZ450FX has a Wet weight of 113.9 kg (251.1 pounds).
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