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2025 KTM 50 SX

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Specs and Features

ENGINE

TRANSMISSION

Single-speed automatic

STARTER

Kickstarter

STROKE

40.7 mm

BORE

39.5 mm

CLUTCH

Centrifugal clutch (adjustable)

DISPLACEMENT

49.9 cm³

EMS

Seletra 2p D36

DESIGN

1-cylinder, 2-stroke engine

FUEL-MIXTURE GENERATION

Dell'Orto PHBG 19 BS

CHASSIS

WEIGHT (WITHOUT FUEL)

42.5 kg

TANK CAPACITY (APPROX.)

2.3 l

WHEELBASE

1026 mm

FRONT BRAKE DISC DIAMETER

160 mm

REAR BRAKE DISC DIAMETER

160 mm

FRONT BRAKE

Disc brake

REAR BRAKE

Disc brake

CHAIN

415, Non-sealed

FRAME DESIGN

Chrome-molybdenum steel central-tube frame

FRONT SUSPENSION

XACT 35 WP Upside-Down fork, Ø 35 mm

GROUND CLEARANCE

233 mm

HANDLEBAR

Tapered aluminum Ø 28/22/18 mm

REAR SUSPENSION

XACT WP mono shock

SEAT HEIGHT

653 mm

SILENCER

Aluminium

STEERING HEAD ANGLE

66 °

REAR SUBFRAME DESIGN

Steel

SUSPENSION TRAVEL (FRONT)

200 mm

SUSPENSION TRAVEL (REAR)

190 mm

WHEELS

Spoked wheels with aluminium rims

2025 KTM 50 SX

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.

Adjustablity

Different adjustability options were built into the 2025 KTM 50 SX construction using scientific statistical data and young racers' input data. Finding the right fit for your little ripper is easy thanks to height-adjustable suspension, handlebar position, subframe, and bodywork, taking the seat height from a low setting of 634mm to a taller setting of 682mm.

Performance

The 2025 KTM 50 SX features a modern and compact engine using the latest 2-stroke technology. Using a 3-shaft design, the crankshaft is positioned near the center of gravity, which not only benefits mass centralization but also creates the ideal intake angle into the reed valve for top-level performance. An independent cylinder blank allows for a completed cylinder design, with increased power.

Tank

The KTM 50 SX is ready to fuel the fire in your little ripper with a tank design that compliments the frame and bodywork.

Wheels & Tires

Rolling off the race rig and into the pit lane, the 2025 KTM 50 SX uses lightweight, black anodized, aluminum rims just like the full-size KTM SX range. These provide the highest levels of strength and reliability, while MAXXIS MX-ST tires deliver outstanding performance on any terrain, along with exceptional straight-line stability.

Exhaust

The exhaust system, features the same manufacturing process as the full-size 2-stroke KTM SX range, with improved overall quality and performance. This has resulted in massive improvements in thermodynamics. Moreover, improved sealing of the silencer end cap and a rubber between the header pipe and silencer adds another level of quality to the exhaust system. The silencer comes with a black anodized finish and a signature 'Braaaaap!'.

2025 KTM 50 SX

Specs and Features

2025 KTM 50 SX

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