Motocross Bikes
2027Yamaha YZ450FX
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The 2027 Yamaha YZ450FX is redesigned around the latest YZ450F, with a YZ450F-derived frame and engine brackets and a 450cc DOHC single retuned for low-to-mid-range control through revised cam timing and a new magneto rotor. A hydraulic clutch, 51-tooth rear sprocket and 5-speed gearbox suit cross-country racing, with 300mm/305mm of KYB suspension travel, Dunlop Geomax AT82 tyres, a 37.6-inch seat and a claimed 249 lb wet weight. US MSRP is $10,499.
- Capacity
- 450.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Wet weight
- 112.9 kg
- Seat height
- 955 mm
- Power
- Not on record
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What’s new for the 2027 Yamaha YZ450FX
vs the 2026| Spec | 2026 | 2027 |
|---|---|---|
| Power | 50.0 HP (36.8 kW) | not listed |
| Fuel capacity | 8.00 litres (2.11 US gallons) | 7.90 litres (2.09 US gallons) |
| Rear brakes | Single disc. Hydraulic | Hydraulic disc, 220mm |
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
- Engine type
- Single, four-stroke
- Bore x stroke
- 97.0 x 60.8 mm
- Compression
- 13.0:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- TCI
- Valves per cylinder
- 4
- Lubrication system
- Wet sump
- Power
- Not on record - add it
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
- 825 mm
- Overall height
- 1265 mm
- Seat height
- 955 mm
- Wet weight
- 112.9 kg
- Fuel capacity
- 7.90 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
- Hydraulic disc, 220mm
- Rear brakes diameter
- 220 mm
- Front tyre
- 80/100-21 Dunlop Geomax AT82
- Rear tyre
- 120/90-18 Dunlop Geomax AT82
Other
- Comments
- Redesigned for 2027: YZ450F-derived frame and engine brackets, engine retuned for low-to-mid-range control (cam timing, new AC magneto rotor), hydraulic clutch, 51T rear sprocket, Dunlop Geomax AT82 cross-country tyres. Power not published by Yamaha.
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 | 2018 | 2023 | 2025 | 2027 |
|---|---|---|---|---|---|
| Capacity | 450 cc | 450 cc | 450 cc | 450 cc | 450 cc |
| Seat height | 965 mm | 965 mm | 955 mm | 955 mm | 955 mm |
| Fuel capacity | 7.6 L | 7.6 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 2027 Yamaha YZ450FX has a Capacity of 450.0 ccm (27.46 cubic inches).
How many gears does the Yamaha YZ450FX have?
The 2027 Yamaha YZ450FX has a Gearbox of 5-speed.
How much does the Yamaha YZ450FX weigh?
The 2027 Yamaha YZ450FX has a Wet weight of 112.9 kg (248.9 pounds).
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