250 SX - 2020


250 SX - 2020 Promotions

Model Description

Whether its power-to-weight or power and control, the KTM 250 SX is the perfect combination of all that counts. Featuring a high-performance 2-stroke engine fitted within a state-of-the-art chassis, this powerhouse is undoubtedly the fastest 250 cc 2-stroke on track. This proven race weapon is the right choice for those who thrive on that glorious 2-stroke sound while smashing out one hot lap after the next.
To reduce the vibration levels, the KTM 250 SX engine has been fitted with a balancer shaft. This is primarily of benefit to the rider as this reduces stress and further increases the level of riding comfort.
The KTM 250 SX incorporates a DDS (damped diaphragm steel) clutch developed in-house by KTM with a robust outer clutch hub and extremely heat-resistant steel clutch plates. A diaphragm spring instead of conventional coil springs, which requires less effort to operate the clutch. This design also means that sufficient space is left to incorporate a damping system in the clutch hub. This increases traction and also extends the life of the clutch. It goes without saying that this hydraulically-operated Brembo clutch also means easy and precise action and virtually playful control.
When it comes to power delivery and performance, the exhaust plays a key role and packs a punch that is hard to beat. For the production of the exhaust pipe the latest 3D stamping technology is used. The design guarantees enough ground clearance and with a slim construction contributes to the very compact layout of the entire system.
The cylinder of the KTM 250 SX with a 66.4 mm bore is fitted with a sophisticated TVC power valve, featuring a machined exhaust port, which guarantees a strong power delivery. The bike's power curve can be changed in a matter of seconds using the two power valve springs supplied, enabling the rider to optimize settings for different track conditions and to suit his own personal preferences.

The 38 mm flat slide carburetor provides smooth and controllable performance throughout the entire rpm range. The setting has been matched perfectly to the engine, air filter box and exhaust system. As a result, the engine's throttle response is instantaneous, and the smooth power delivery is a dream.

The 2-stroke engine of the KTM 250 SX is regarded as the most powerful engine in its class. Fitted with a TVC (twin valve control) power valve, a balancer shaft to reduce vibrations, a 5-speed transmission and a hydraulic DDS clutch, it is setting the standards in its segment. As a result of modifications to the cylinder and exhaust system, this compact powerhouse shames the competition with outstanding performance and agility, and is the right choice for all those who love that typical 2-stroke sound and low purchasing and maintenance costs.
The engine is coupled to a 5-speed transmission with gear ratios optimized specifically for motocross racing. KTM's advanced No-Dirt technology is used for the gear shift lever to prevent mud and dirt from fouling the lever joint and thus guarantees reliable gear changing at all times.

Model Specification


Engine Type

Single cylinder, 2-stroke


249 cc




5 gears


Wet multi-disc clutch, Brembo hydraulics



Central double-cradle type


5/8 x 1/4

Steering Head Angle

63.9 degrees

Tank Capacity

7.5 litres


Brake System Front

Disc brake 260 mm

Brake System Rear

Disc brake 220 mm


Front Suspension

XACT WP upside-down fork, 48 mm

Rear Suspension

XACT WP shock absorber with linkage

Suspension Travel Front

310 mm

Suspension Travel Rear

300 mm



66.4 mm


72 mm

Ground Clearance (unloaded)

375 mm

Seat Height

950 mm

Weight (No Fuel)

95.5 kg


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