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Motocross Bikes

2023KTM 450 SX-F

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The 2023 KTM 450 SX-F is a competitive motocross machine designed for intermediate to advanced riders seeking a lightweight, powerful package. Its liquid-cooled single-cylinder four-stroke engine delivers 63 horsepower with excellent mid-range torque, making it ideal for cross-country racing and technical terrain. Known for its agile handling and reliable Brembo braking, the 450 SX-F excels in both amateur and professional motocross competition.

Capacity: 449.9 ccm
Engine: Single, four-stroke
Gearbox: 5-speed
Dry weight: 102.6 kg
Seat height: 958 mm
Power: 63.0 HP (46.0 kW)

⇄ Compare with another bike ＋ Add to garage All model years

What’s new for the 2023 KTM 450 SX-F

vs the 2022

Spec	2022	2023
Torque	46.5 Nm (4.7 kgf-m or 34.3 ft.lbs) @ 7500 RPM	45.8 Nm (4.7 kgf-m or 33.8 ft.lbs) @ 7000 RPM
Dry weight	100.5 kg (221.6 pounds)	102.6 kg (226.2 pounds)
Fuel capacity	7.50 litres (1.98 US gallons)	7.20 litres (1.90 US gallons)

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

Off-road & trail98%

Cornering90%

City riding10%

Daily riding15%

Touring10%

Two-up5%

Track92%

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?

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Your height

Inseam (optional)

Units

At 958mm, a rider of 68.9" with a 31" (estimated) inseam will not reach the ground comfortably on the 2023 KTM 450 SX-F, with a cramped knee angle of around 85 degrees and an upright riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at over 900 mm — Sky High →

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Full specifications

Engine

Capacity: 449.9 ccm
Power: 63.0 HP (46.0 kW)
Torque: 45.8 Nm (4.7 kgf-m) @ 7000 RPM
Engine type: Single, four-stroke
Power/weight ratio: 0.6140 HP/kg (dry)
Bore x stroke: 95.0 x 63.4 mm
Compression: 12.8:1
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: 1485 mm
Seat height: 958 mm
Dry weight: 102.6 kg
Fuel capacity: 7.20 litres
Ground clearance: 343 mm

Chassis & suspension

Frame: Central double-cradle-type 25CrMo4 steel
Front suspension: WP XACT-USD, 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: Torque is a rear-wheel dyno figure.

Specs last verified against published sources: October 2026.

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	2023	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

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MotorcycleDB

The 2023 KTM 450 SX-F is a top-of-the-line motocross bike that offers incredible power and performance. With its 450cc engine, this bike delivers unmatched speed and acceleration, making it a great choice for competitive riders. The lightweight and agile design of the 450 SX-F allows for precise handling and control, making it a favorite among motocross enthusiasts. Additionally, the bike features advanced suspension technology and high-quality components, ensuring a smooth and comfortable ride over rough terrain. Overall, the 2023 KTM 450 SX-F is a powerhouse of a bike that will not disappoint riders looking for top-tier performance.

The 2023 KTM 450 SX-F is a game-changer in the world of motocross, with its impressive speed and agility. KTM has once again proven itself as a leader in the industry with this top-notch bike. Whether you're a professional rider or just a weekend warrior, the 450 SX-F offers exceptional performance and handling that will take your off-road adventures to the next level. If you're in the market for a high-performance motocross bike, the 2023 KTM 450 SX-F should be at the top of your list.

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