Motocross Bikes
2021KTM 250 SX-F Factory Edition
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The 2021 KTM 250 SX-F Factory Edition is a high-revving motocross bike with factory racing parts. Its liquid-cooled 249.9cc four-stroke single makes 43 hp through a five-speed gearbox. A 960 mm seat and 104.8 kg wet weight make it a competitive race machine.
- Capacity
- 249.9 ccm
- Engine
- Single, four-stroke
- Gearbox
- 5-speed
- Dry weight
- 98.5 kg
- Seat height
- 960 mm
- Power
- 43.0 HP (31.6 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built as a pure motocross competition machine, it's designed for closed-course racing on dirt tracks rather than any form of street or general-purpose riding.
- Built for
- It has the character of a razor-sharp, lightweight racing tool that thrives on aggressive throttle input, high-rev power delivery, and precise rider inputs through corners and jumps.
- Not ideal for
- This is not the bike for commuters, touring riders, passengers, or anyone seeking road-legal comfort and low-maintenance simplicity.
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)
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.4365 HP/kg (dry)
- Bore x stroke
- 78.0 x 52.3 mm
- Compression
- 13.5:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Electric
- Ignition
- Keihin EMS
- Lubrication system
- Premix 60:1
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet, CSS multi-disc clutch, Brembo hydraulics
Dimensions & weight
- Wheelbase
- 1485 mm
- Seat height
- 960 mm
- Dry weight
- 98.5 kg
- Wet weight
- 104.8 kg
- Fuel capacity
- 7.00 litres
- Ground clearance
- 370 mm
Chassis & suspension
- Frame
- 25CrMo4 steel central-tube frame
- Front suspension
- WP-USD, AER 48, Ø 48 mm
- Rear suspension
- WP shock absorber with linkage
- Front wheel travel
- 300 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
- 300 mm
- Rear brakes
- Single disc. Brake calipers on floating bearings
- Rear brakes diameter
- 260 mm
Other
- Color options
- Orange/blue/white/black
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 | 2017 | 2019 | 2021 | 2022 | 2024 | 2026 |
|---|---|---|---|---|---|---|
| Capacity | 250 cc | 250 cc | 250 cc | 249 cc | 250 cc | 250 cc |
| Dry weight | 99 kg | 99 kg | 99 kg | 99 kg | 102 kg | 102 kg |
| Seat height | 960 mm | 960 mm | 960 mm | 960 mm | 958 mm | 958 mm |
| Fuel capacity | 7 L | 7 L | 7 L | 7 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 250 SX-F Factory Edition?
The 2021 KTM 250 SX-F Factory Edition has a Capacity of 249.9 ccm (15.25 cubic inches).
What engine power does the KTM 250 SX-F Factory Edition have?
The 2021 KTM 250 SX-F Factory Edition has a Power of 43.0 HP (31.6 kW).
How many gears does the KTM 250 SX-F Factory Edition have?
The 2021 KTM 250 SX-F Factory Edition has a Gearbox of 5-speed.
How much does the KTM 250 SX-F Factory Edition weigh?
The 2021 KTM 250 SX-F Factory Edition has a Dry weight of 98.5 kg (217.2 pounds).
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