When the next step up is into the 50cc class, there is no better option than the most powerful 50cc out there. For 2025, the KTM 50 SX is built around an advanced steel frame, housing a powerful engine, a 35mm WP XACT AER fork, a WP XACT monoshock, and an advanced hydraulic Formula brake system. Simply put – it’s the most advanced and READY TO RACE 50 cc mini-crosser available to your little racer.
Single-speed automatic
Kickstarter
40.7 mm
39.5 mm
Centrifugal clutch (adjustable)
49.9 cm³
Seletra 2p D36
1-cylinder, 2-stroke engine
Dell’Orto PHBG 19 BS
42.5 kg
2.3 l
1026 mm
160 mm
160 mm
Disc brake
Disc brake
415, Non-sealed
Chrome-molybdenum steel central-tube frame
XACT 35 WP Upside-Down fork, Ø 35 mm
233 mm
Tapered aluminum Ø 28/22/18 mm
XACT WP mono shock
653 mm
Aluminium
66 °
Steel
200 mm
190 mm
Spoked wheels with aluminium rims