150 SX - 2020


150 SX - 2020 Promotions

Model Description

With the agility of a 125 and a healthy dose of extra power, the KTM 150 SX is a lively package ready to take on the 250 cc 4-strokes. From within its dynamic lightweight chassis, the compact engine produces class-leading torque and power. Everything about this motorcycle screams high-performance fun and it goes into battle as the ultimate on-track competitor.
The increased engine power is due, among other things, to the header with an optimal shape using the latest 3D stamping technology and silencer internals. A welded aluminum bracket replaces the previous plastic collars used to secure the silencer and also helps to bring down the weight.

The reliable 6-speed transmission is an extremely high-quality unit and is made by Pankl from Austria. 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.

The lightweight DS (diaphragm steel) clutch has a one-piece outer clutch hub and a primary gear made of high strength billet steel. This guarantees unbeatable reliability and a compact, rivetless construction. Incorporating steel carrier friction discs, the extremely heat-resistant clutch plates ensure reliable disengagement of the clutch. They are pre-tensioned by means of a specially designed diaphragm spring, which significantly reduces the force required to pull the clutch lever. The Brembo hydraulic system also ensures an easy and precise clutch action.
The engine of the KTM 150 SX, which was developed using the most advanced expertise and state-of-the-art technology, delivers power that is second to none in its class – and it does that over the entire rpm range. The rider benefits with excellent rideability that delivers amazingly fast lap times. It shares its key components with the best-in-class KTM 125 SX. This means that by simply mounting the cylinder, cylinder head and piston onto a 125cc stock engine it can be turned into a KTM 150 SX engine, without having to replace the crankshaft.
In order to centralize the masses more effectively, the crankshaft is positioned high up and close to the center of gravity, which also has a positive effect on rideability. The extremely compact die-cast crankcase brings down the overall weight of what is already a light bike.
At the core of the engine is a compact cylinder with a 58 mm bore. It features an innovative power valve unit with a sophisticated mechanism designed for the lateral support exhaust ports. The exhaust port layout enhances engine performance, while the precise machining of the upper contour of the exhaust port ensures accurate port timing. Together with a twin-component cylinder head, this has resulted in outstanding engine performance and throughout the entire rpm range.

Fitted with a 38 mm flat slide MIKUNI carburetor, the KTM 150 SX engine provides both a smooth and controllable power delivery over the entire rpm range and offers precise throttle response.

Model Specification


Engine Type

Single cylinder, 2-stroke


143.9 cc




6 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



58 mm


54.5 mm

Ground Clearance (unloaded)

375 mm

Seat Height

950 mm

Weight (No Fuel)

87.5 kg


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