2026KTM 250 SX

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The 2026 KTM 250 SX is a lightweight 2-stroke motocross bike engineered for intermediate to advanced riders seeking competitive performance on the track. Powered by a 249cc single-cylinder engine with modern EFI technology and paired with WP suspension components, it delivers sharp handling and responsive power delivery. Renowned for its agility and race-ready setup, the 250 SX dominates its class in competitive motocross racing.

Capacity: 249.0 ccm
Engine: Single, two-stroke
Gearbox: 5-speed
Dry weight: 99.4 kg
Seat height: 958 mm
Power: 24.9 HP (18.3 kW)

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What’s new for the 2026 KTM 250 SX

vs the 2025

Spec	2025	2026
Front brakes	Single disc	Disc brake
Rear brakes	Single disc	Disc brake

Other years 2000 2001 2002 2003 2004 2005 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

Off-road & trail98%

Cornering90%

City riding5%

Daily riding5%

Touring8%

Two-up0%

Track85%

Best for: Built purely for motocross track riding and racing, not for street use or general transportation.
Built for: Sharp, explosive, and razor-agile, this bike rewards aggressive riding and precise throttle control with rapid acceleration bursts and flickable handling.
Not ideal for: This is not suitable for commuting, touring, carrying passengers, or riders seeking a comfortable, low-maintenance everyday motorcycle.

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 2026 KTM 250 SX, 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: 249.0 ccm
Power: 24.9 HP (18.3 kW)
Engine type: Single, two-stroke
Power/weight ratio: 0.2505 HP/kg (dry)
Bore x stroke: 66.4 x 72.0 mm
Cooling system: Liquid
Fuel system: Injection
Starting: Electric
Ignition: Vitesco Technologies EMS
Lubrication system: Mixture oil lubrication 1:60

Transmission

Gearbox: 5-speed
Transmission type: Manual
Final drive: Chain
Clutch: Wet, DDS multi-disc clutch, Brembo hydraulics

Dimensions & weight

Wheelbase: 1495 mm
Seat height: 958 mm
Dry weight: 99.4 kg
Fuel capacity: 7.20 litres
Ground clearance: 354 mm

Chassis & suspension

Frame: Central double-cradle-type 25CrMo4 steel
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°
Trail: 116 mm

Brakes & wheels

Front brakes: Disc brake
Front brakes diameter: 260 mm
Rear brakes: Disc brake
Rear brakes diameter: 220 mm
Front tyre: 80/100-21
Rear tyre: 110/90-19

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	2000	2007	2014	2020	2026	2027
Capacity	249 cc	249 cc	249 cc	249 cc	249 cc	249 cc
Dry weight	101 kg	98 kg	96 kg	96 kg	99 kg	96 kg
Seat height	925 mm	925 mm	992 mm	950 mm	958 mm	958 mm
Fuel capacity	7.5 L	7.5 L	7.5 L	7.5 L	7.2 L	7.2 L