Motocross Bikes
2021KTM 250 SX-F
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The 2021 KTM 250 SX-F is a competitive motocross machine engineered for intermediate to advanced riders seeking aggressive performance in closed-course racing. Powered by a potent 250cc four-stroke engine with premium Brembo hydraulics and a responsive five-speed transmission, it delivers the precision handling and power delivery expected of KTM's championship-winning SX-F lineage. Best known for its sharp cornering geometry and dependable power characteristics, this bike excels in technical terrain and demanding race conditions.
- Capacity
- 249.9 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 99.0 kg
- Seat height
- 950 mm
- Power
- 43.0 HP (31.6 kW)
What’s new for the 2021 KTM 250 SX-F
vs the 2020| Spec | 2020 | 2021 |
|---|---|---|
| Torque | 26.2 Nm (2.7 kgf-m or 19.3 ft.lbs) @ 9200 RPM | 25.9 Nm (2.6 kgf-m or 19.1 ft.lbs) @ 9100 RPM |
| Seat height | 960 mm (37.8 inches) | 950 mm (37.4 inches) |
| Front suspension | WP-USD, AER 48, Ø 48 mm | WP XACT-USD, Ø 48 mm |
| Rear suspension | WP shock absorber with linkage | WP XACT Monoshock with linkage |
| Front brakes | Single disc. Brake calipers on floating bearings | Single disc |
| Rear brakes | Single disc. Brake calipers on floating bearings | Single disc |
| Compression | 14.0:1 | 14.3:1 |
Other years
2006
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 purely as a motocross competition bike for closed circuits and tracks, with sharp handling and high-performance suspension rather than everyday usability.
- Built for
- A lightweight, race-bred single-cylinder machine defined by aggressive acceleration, precise cornering, and razor-sharp responsiveness over rough terrain.
- Not ideal for
- This bike is not suitable for riders wanting a comfortable commuter, a passenger-friendly machine, or a long-distance touring companion.
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
- 249.9 ccm
- Power
- 43.0 HP (31.6 kW)
- Torque
- 25.9 Nm (2.6 kgf-m) @ 9100 RPM
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.4343 HP/kg (dry)
- Bore x stroke
- 78.0 x 52.3 mm
- Compression
- 14.3:1
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- Keihin EMS
- Valves per cylinder
- 4
- Lubrication system
- Forced oil lubrication with 2 Eaton pumps
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet multi-disc clutch, Brembo hydraulics
Dimensions & weight
- Wheelbase
- 1495 mm
- Seat height
- 950 mm
- Dry weight
- 99.0 kg
- Fuel capacity
- 7.00 litres
- Ground clearance
- 370 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)
- 26.5°
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 260 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 220 mm
- Front tyre
- 80/100-21
- Rear tyre
- 110/90-19
Other
- Color options
- Orange/white/black
- Comments
- 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 | 2006 | 2011 | 2017 | 2021 | 2022 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 250 cc | 249 cc | 250 cc | 250 cc | 250 cc | 250 cc |
| Dry weight | 99 kg | 100 kg | 98 kg | 99 kg | 99 kg | 101 kg |
| Seat height | 925 mm | 992 mm | 960 mm | 950 mm | 950 mm | 958 mm |
| Fuel capacity | 7 L | 7.5 L | 7 L | 7 L | 7.5 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 250 SX-F?
The 2021 KTM 250 SX-F has a Capacity of 249.9 ccm (15.25 cubic inches).
What engine power does the KTM 250 SX-F have?
The 2021 KTM 250 SX-F has a Power of 43.0 HP (31.6 kW).
How many gears does the KTM 250 SX-F have?
The 2021 KTM 250 SX-F has a Gearbox of 5-speed.
What is the torque of the KTM 250 SX-F?
The 2021 KTM 250 SX-F has a Torque of 25.9 Nm (2.6 kgf-m or 19.1 ft.lbs) @ 9100 RPM.
How much does the KTM 250 SX-F weigh?
The 2021 KTM 250 SX-F has a Dry weight of 99.0 kg (218.3 pounds).
Shop this bike
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The 2021 KTM 250 SX-F is a powerful and agile motocross bike that delivers impressive performance on the track. With its lightweight and nimble design, this motorcycle offers excellent handling and maneuverability, allowing riders to tackle tight corners and challenging terrain with ease. The 250cc engine provides ample power, while the advanced suspension system ensures a smooth and controlled ride. Overall, the 2021 KTM 250 SX-F is a top choice for motocross enthusiasts looking for a high-performance bike that can handle the demands of intense racing.
From its sleek and aggressive design to its cutting-edge technology, the 2021 KTM 250 SX-F is a standout in the motocross market. Whether you're a seasoned rider or just getting started in the sport, this bike offers a winning combination of power, performance, and precision. With its championship-winning pedigree and impressive list of features, the 2021 KTM 250 SX-F is a top contender in its class. If you're looking for a motocross bike that can take your riding to the next level, the 2021 KTM 250 SX-F is definitely worth considering.
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