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KTM 250 SX
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KTM 250 SX 

The KTM 250 SX is a ferocious two-stroke motocross weapon purpose-built for riders craving explosive power and lightweight agility. With full READY-TO-RACE engineering and modern refinements, it delivers a thrilling, track-ready ride that’s both elite and accessible.
 Performance & Power Packed with a liquid-cooled 249 cc two-stroke single-cylinder engine, the 250 SX churns out an impressive 53 hp, boasting a remarkable specific output exceeding 210 hp per litre, making it a benchmark in its class. Fuel is delivered via Keihin EFI with an electronic powervalve and rider-selectable mapping for both smooth, usable acceleration and aggressive response. The lightweight engine (approximately 23.9 kg) is paired with an electric start, Brembo hydraulic clutch, and a five-speed gearbox, providing snappy throttle response and seamless shifts.
Control & Comfort Built around a central double-cradle chromoly steel frame with an aluminium-reinforced polyamide subframe, the 250 SX maintains rigidity and precision while managing to stay feather-light. Suspension features a 48 mm WP XACT AER front fork and WP XACT rear shock, both offering up to 310 mm and 300 mm travel respectively with tool-free, easy adjustment. Braking is handled by powerful Brembo discs (260 mm front, 220 mm rear), while a slim, race-focused ergonomics package—complete with optimised tank, seat, and panel shape—ensures a poised and confident ride.
Versatility & Style Draped in aggressive Factory Racing graphics and sharp, aerodynamic bodywork, the 250 SX projects pure competition potential. While it keeps technology lean—focused on fuel injection and selectable maps—it balances convenience with performance, including electric start and simple maintenance features. Lightweight and razor-sharp, it’s primed for club racing, serious training or podium-seeking action, delivering unmatched versatility and iconic race-day presence.
SPECIFICATION

PRICE

On The Road Price From £9,399

ENGINE & TRANSMISSION

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​Design​1-CYLINDER, 2-STROKE ENGINE
​Displacement249 CM³
​Transmission5-SPEED
Fuel-mixture generationKEIHIN EFI, THROTTLE BODY 39MM
​Clutch primary drive teeth​72
​Primary drive ​26:72
​Clutch​WET, DDS MULTI-DISC CLUTCH, BREMBO HYDRAULICS 
​Clutch type ​DDS MULTI-DISC WET CLUTCH
​Clutch operation ​BREMBO HYDRAULICS 
​Engine cylinder ​SINGLE CYLINDER 
​Engine stroke ​2-STROKE

CHASSIS

Frame DesignCENTRAL DOUBLE-CRADLE-TYPE 25CRM04 STEEL
Front Brake DISC BRAKE
Rear Brake ​DISC BRAKE
​Rear subframe designALUMINIUM-REINFORCED POLYAMIDE
​Chain​520, NON-SEALED
​Front Suspension​WP AXT-USD (AER) 0 48 MM 
Rear SuspensionWP XACT MONOSHOCK WITH LINKAGE 
​Suspension travel (front) 310 MM
​Suspension travel (rear) 
300 MM 
​Front suspension adjustment ​COMPRESSION (HIGH AND LOW SPEED), REBOUND 
​Rear suspension setting COMPRESSION AND REBOUND ADJUSTABLE 

DIMENSIONS & WEIGHTS

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​Seat height 958 MM
​Ground clearance 354 MM
​Tank capacity (approx.) 7.2 L

FUEL CONSUMPTION

     

STANDARD EQUIPMENT

     

OPTIONAL EQUIPMENT

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