2026 KTM 250 SX-F SX-F

The 2026 KTM 250 SX-F continues to set the benchmark in the ultra-competitive 250 cc four stroke motocross class.

Built around KTM’s READY TO RACE philosophy and refined through countless hours of factory racing development, the 2026 model delivers explosive performance, lightweight agility and championship proven technology that keeps it at the front of starting gates around the world.

At its heart is a highly developed 249.9 cc liquid cooled DOHC single cylinder engine designed to deliver class leading power with razor sharp throttle response.

Featuring an 81.0 mm bore and 48.5 mm stroke with a 14.5:1 compression ratio, the engine breathes through a 44 mm Keihin electronic fuel injection throttle body, ensuring precise fuel delivery and instant response across the rev range.

Dyno testing places peak output at approximately 41.8 horsepower and 19.7 lb ft of torque, giving the 250 SX F one of the strongest engines in the class and impressive top end pull when the revs climb.

Power is transferred through a close ratio 5 speed transmission paired with a Brembo hydraulic wet multi disc DS clutch, providing consistent feel and durability under hard race conditions. Advanced rider aids further sharpen the bike’s competitive edge, with launch control for holeshot performance, quickshifter functionality for clutchless upshifts, and selectable engine maps with traction control, allowing riders to tailor power delivery to track conditions.

The chassis is built around KTM’s lightweight central double cradle 25CrMo4 chromoly steel frame, engineered to provide the ideal balance of rigidity and flex for precise cornering and rider feedback. A lightweight aluminium reinforced polyamide subframe contributes to the bike’s incredibly low weight of around 101 kg without fuel, making it one of the lightest machines in the 250 four stroke category.

Suspension duties are handled by WP XACT components, including a 48 mm WP XACT AER air fork up front with 310 mm of travel, paired with a WP XACT monoshock with linkage delivering 300 mm of travel at the rear. Both ends are fully adjustable for compression and rebound, allowing riders to fine tune handling for everything from deep sand circuits to hard packed supercross style tracks.

Dimensionally the bike remains purpose built for elite motocross performance, featuring a 958 mm seat height, 343 mm ground clearance, and a 7.2 litre fuel tank, ensuring optimal rider ergonomics and race ready endurance for demanding motos.

On the racetrack, the 250 SX F has established itself as one of the most decorated machines in modern motocross. The platform has powered riders to multiple AMA 250 Supercross and Pro Motocross championships, as well as dominant results in the FIM MX2 World Championship, reinforcing KTM’s reputation as one of the most successful manufacturers in international motocross competition. Its success is mirrored locally in Australia, where KTM machinery consistently battles for podium finishes in the Australian ProMX MX2 Championship, making it a favourite among both factory supported riders and privateers chasing national success.

Combining cutting edge engineering, race proven electronics and a lightweight championship winning chassis, the 2026 KTM 250 SX F stands as a true factory bred motocross weapon. Whether charging for the holeshot, railing deep ruts or scrubbing jumps on a national circuit, it remains one of the sharpest tools available for riders determined to run at the front of the pack.