Motocross Bikes
2025KTM 450 SX-F
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The 2025 KTM 450 SX-F is a professional-grade motocross machine designed for competitive riders and serious enthusiasts. Powered by a 449cc liquid-cooled four-stroke engine delivering 63 horsepower with precision Keihin fuel injection, it excels in high-speed racing and demanding off-road conditions. Known for its aggressive performance and championship-winning pedigree, the 450 SX-F dominates the premier motocross class.
- Capacity
- 449.9 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 103.1 kg
- Seat height
- 958 mm
- Power
- 63.0 HP (46.3 kW)
What’s new for the 2025 KTM 450 SX-F
vs the 2024| Spec | 2024 | 2025 |
|---|---|---|
| Torque | 46.9 Nm (4.8 kgf-m or 34.6 ft.lbs) @ 7500 RPM | 44.6 Nm (4.5 kgf-m or 32.9 ft.lbs) @ 7100 RPM |
| Front suspension | WP XACT-USD, Ø 48 mm | WP XACT-USD (AER), Ø 48 mm |
| Compression | 12.8:1 | 13.0:1 |
Other years
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built for motocross racing and aggressive off-road riding on tracks and rough terrain.
- Built for
- A light, explosive, high-revving single-cylinder racer that rewards aggressive input with razor-sharp agility and jump-ready suspension.
- Not ideal for
- This bike is not suited to riders wanting a comfortable commuter, long-distance tourer, or a passenger-friendly ride.
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
- 449.9 ccm
- Power
- 63.0 HP (46.3 kW)
- Torque
- 44.6 Nm (4.5 kgf-m) @ 7100 RPM
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.6111 HP/kg (dry)
- Bore x stroke
- 95.0 x 63.4 mm
- Compression
- 13.0:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- Keihin EMS
- Valves per cylinder
- 4
- Lubrication system
- Pressure circulation lubrication with two Eaton pumps
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet, DDS multi-disc clutch, Brembo hydraulics
Dimensions & weight
- Wheelbase
- 1493 mm
- Seat height
- 958 mm
- Dry weight
- 103.1 kg
- Fuel capacity
- 7.20 litres
- Ground clearance
- 343 mm
Chassis & suspension
- Frame
- Central double-cradle-type 25CrMo4 steel. Aluminum-reinforced polyamide subframe.
- Front suspension
- WP XACT-USD (AER), Ø 48 mm
- Rear suspension
- WP XACT Monoshock with linkage
- Front wheel travel
- 310 mm
- Rear wheel travel
- 300 mm
- Rake (fork angle)
- 26.1°
Brakes & wheels
- Front brakes
- Single disc. Brake calipers on floating bearings
- Front brakes diameter
- 260 mm
- Rear brakes
- Single disc. Brake calipers on floating bearings
- Rear brakes diameter
- 220 mm
- Front tyre
- 80/100-21
- Rear tyre
- 110/90-19
Other
- Color options
- Orange/white/grey
- Comments
- Connectivity. 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 | 2007 | 2012 | 2017 | 2022 | 2025 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 449 cc | 449 cc | 449 cc | 449 cc | 450 cc | 450 cc |
| Dry weight | 104 kg | 108 kg | 100 kg | 101 kg | 103 kg | 103 kg |
| Seat height | 925 mm | 992 mm | 960 mm | 950 mm | 958 mm | 958 mm |
| Fuel capacity | 8 L | 7.5 L | 7 L | 7.5 L | 7.2 L | 7.2 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 KTM 450 SX-F?
The 2025 KTM 450 SX-F has a Capacity of 449.9 ccm (27.45 cubic inches).
What engine power does the KTM 450 SX-F have?
The 2025 KTM 450 SX-F has a Power of 63.0 HP (46.3 kW).
How many gears does the KTM 450 SX-F have?
The 2025 KTM 450 SX-F has a Gearbox of 5-speed.
What is the torque of the KTM 450 SX-F?
The 2025 KTM 450 SX-F has a Torque of 44.6 Nm (4.5 kgf-m or 32.9 ft.lbs) @ 7100 RPM.
How much does the KTM 450 SX-F weigh?
The 2025 KTM 450 SX-F has a Dry weight of 103.1 kg (227.3 pounds).
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