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50 SX Factory - 2026 Specifications and Reviews

The 2026 KTM 50 SX Factory is purpose-built for young riders and beginners entering competitive off-road racing. Powered by a lightweight 49cc two-stroke engine with automatic clutch and aggressive styling, it delivers sharp handling and responsive performance ideal for motocross training. Known for its durability and factory-level components, this minibike bridges recreational riding and professional youth racing programs.

2026
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General information

Color OptionsOrange/black/grey
CategoryMinibike, cross
ModelKTM 50 SX Factory

Engine and Transmission Specifications

StartingKick
ClutchCentrifugal
Final DriveChain (final drive)
GearboxAutomatic
IgnitionSeletra 2p D36 EMS
InductionCarburettor. Dell´Orto PHBG 19 BS
Bore x Stroke39.5 x 40.0 mm (1.6 x 1.6 inches)
Engine DetailsReed-valve
Capacity49.0 ccm (2.99 cubic inches)
 
 

Physical measures and capacities

Fuel Capacity2.30 litres (0.61 US gallons)
Wheelbase1026 mm (40.4 inches)
Ground Clearance233 mm (9.2 inches)
Seat Height653 mm (25.7 inches) If adjustable, lowest setting.
Dry Weight42.8 kg (94.4 pounds)
 
 

50 SX Factory dimensions and frame

WheelsDunlop Geomax MX 53 tires
Rear BrakesSingle disc
Brake Disc Diameter160 mm (6.3 inches)
Front BrakesSingle disc
Rear Wheel Travel190 mm (7.5 inches)
Rear SuspensionXACT WP PDS mono shock
Front Wheel Travel200 mm (7.9 inches)
Front SuspensionXACT 35 WP Upside-Down fork, Ø 35 mm
FrameChrome-molybdenum steel central-tube

Other specs

Related bikesList related bikes for comparison of specs.
Ask questionsJoin the 25 KTM 50 SX Factory discussion group or the general KTM discussion group.
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Update specsReport missing specs or required updates.
CommentsIntended for children 4-10 years old. Special Factory Edition.
Rake (fork angle)24.0°
Exhaust systemAluminum
Driveline415, Non-sealed chain
Engine typeSingle cylinder, two-stroke
Model year2025

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