Engineered by KTM for the cross - motocross motorcycle segment, the 2025 KTM 150 SX relies on a 144 cc (8.8 cu in) liquid-cooled single cylinder, two-stroke powerplant. Internal engine geometry specifies a bore and stroke of 58.0 x 54.5 mm (2.3 x 2.1 inches).
On the scales, the 150 SX measures 92.6 kg (204 lbs) dry. Rider ergonomics and chassis geometry center around a 958 mm (37.7 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,493 mm (58.8 in) wheelbase engineered for balanced agility and highway composure. The 7.2-liter (1.9 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's KTM archive, this model family spans 15 indexed model years from 2009 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
958 mm (37.7 in)
Engine
Displacement144.0 ccm (8.79 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsReed intake.
Bore x Stroke58.0 x 54.5 mm (2.3 x 2.1 inches)
Fuel SystemInjection. Keihin EFI, throttle body 39 mm
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
