MotoSpecs

2023 KTM 50 SX Specifications

Minibike, cross • Specs last verified 13 July 2026

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2023 KTM 50 SX Overview

KTM 50 SX is a minibike, cross motorcycle, displacing 49 cc. Power comes from a Single cylinder, two-stroke engine. Bore and stroke come in at 39.5 x 40 mm. On the road, the 2023 50 SX tips the scales at 41.5 kg, carries a 2.30-litre fuel tank and offers a seat height of 665 mm. The full 2023 KTM 50 SX spec sheet below covers every technical detail, from suspension travel to tyre sizes.

2023 50 SX - Pros & Cons

Strengths

  • Accessible seat height: A 665 mm seat height keeps this manageable for most riders, which helps confidence at parking-lot speeds.

Considerations

  • Carburetor fuelling: Expect to spend more time keeping the carbs in tune, especially after long storage periods or a change in altitude.
  • Modest fuel capacity: Range between stops is limited by the 2.30-litre tank - plan fuel stops accordingly on longer routes.
  • Chain final drive upkeep: Budget time for routine chain maintenance - it's cheap to replace but needs consistent attention to avoid premature sprocket wear.

Wear Points & Servicing Notes

Carburetor maintenance

Carburetors on the 50 SX need periodic attention - pilot jets and float needles are the first parts to gum up after the bike sits, and the first thing to check if idle or throttle response degrades.

Brake disc and pad wear

Braking up front comes from Single disc - solid stopping power, with disc and pad wear best checked on the same schedule as tyre changes.

Suspension condition on used examples

The 50 SX's suspension runs XACT 35 WP Upside-Down fork, Ø 35 mm at the front. The rear uses XACT WP PDS mono shock. Fork-seal condition and rear linkage play are the two things worth checking before buying used.

Final drive maintenance

The 50 SX uses chain final drive, which is cheap to replace but needs regular cleaning, lubrication and tension checks to get a full service life out of the sprockets.

Frame & chassis check

Built around a Central-tube frame with double-cradle, the 50 SX's chassis is straightforward to inspect: look for corrosion, cracks or repair welds around stress points like the head-stock and swingarm mounts.

Low-speed handling

41.5 kg keeps the 50 SX easy to move around in tight spaces, car parks and on the stand alike.

50 SX - Buying & Maintenance Guide

What to check before buying

Before handing over money for a used 2023 KTM 50 SX, cover the fundamentals: service book and oil change history, chain and sprocket wear, and any sign of oil weeping around the casings. Cold-starting it yourself tells you a lot - a healthy 50 SX should catch quickly and settle into a smooth idle.

Oil and filter changes

Nothing protects a 50 SX's engine like disciplined oil changes - stay on the manufacturer's schedule (roughly every 6,000 km or annually). Match the viscosity grade to what the owner's manual specifies, not what's cheapest.

Carburetor upkeep

Deposits in the carbs are the usual culprit behind poor running on a stored 50 SX - strip and clean the float bowls before the first start. Pilot jets clog first and get overlooked most, so make a point of checking them.

2023 KTM 50 SX - Frequently Asked Questions

What engine does the 2023 KTM 50 SX have?
The 2023 KTM 50 SX uses a Single cylinder, two-stroke engine with 49 cc of displacement.
How much does the 2023 KTM 50 SX weigh?
The 2023 KTM 50 SX weighs 41.5 kg. This is the manufacturer's dry figure.
What is the fuel tank capacity of the 2023 KTM 50 SX?
The 2023 KTM 50 SX has a 2.30-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 38-45 km between stops.
Is the 2023 KTM 50 SX suitable for shorter riders?
The 2023 KTM 50 SX has a seat height of 665 mm. This is a comfortable, accessible height for most riders.
What brakes does the 2023 KTM 50 SX have?
The 2023 KTM 50 SX uses Single disc at the front and Single disc at the rear.
What fuel system does the 2023 KTM 50 SX use?
The 2023 KTM 50 SX uses Carburettor, providing precise fuelling across the rev range and reliable cold-start behaviour.
What suspension does the 2023 KTM 50 SX have?
The 2023 KTM 50 SX uses XACT 35 WP Upside-Down fork, Ø 35 mm up front and XACT WP PDS mono shock at the rear.

KTM 50 SX Spec Evolution

The KTM 50 SX was produced across 17 model years (2006-2023). The table below highlights the key specifications that changed across the production run - useful whether you are comparing years or tracking down a specific variant.

Specification 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2021 2022 2023
Wet Weight - - - - - 104.0 kg / 229.3 lbs - - 112.0 kg / 246.9 lbs - - - - - - - -
Dry Weight 38.8 kg / 85.5 lbs 38.8 kg / 85.5 lbs 38.8 kg / 85.5 lbs 39.8 kg / 87.7 lbs 39.8 kg / 87.7 lbs 39.8 kg / 87.7 lbs 41.5 kg / 91.5 lbs 41.5 kg / 91.5 lbs 39.8 kg / 87.7 lbs 39.8 kg / 87.7 lbs 41.5 kg / 91.5 lbs 41.5 kg / 91.5 lbs 41.5 kg / 91.5 lbs 41.5 kg / 91.5 lbs 41.5 kg / 91.5 lbs 41.5 kg / 91.5 lbs 41.5 kg / 91.5 lbs
Engine Detail - - - - - - Reed intake Reed intake. Reed intake. Reed intake. Reed intake. Reed intake. Reed intake Reed intake - - -
Engine Type Single cylinder Single cylinder Single cylinder Single cylinder Single cylinder, two-stroke Single cylinder, two-stroke Single cylinder, two-stroke Single cylinder, two-stroke Single cylinder, two-stroke Single cylinder, two-stroke Single cylinder, two-stroke Single cylinder, two-stroke Single cylinder, two-stroke Single cylinder, two-stroke Single cylinder, two-stroke Single cylinder, two-stroke Single cylinder, two-stroke
Seat Height 650 mm / 25.6 in. 650 mm / 25.6 in. 660 mm / 26.0 in. 684 mm / 26.9 in. 684 mm / 26.9 in. 684 mm / 26.9 in. 684 mm / 26.9 in. 684 mm / 26.9 in. 684 mm / 26.9 in. 684 mm / 26.9 in. 684 mm / 26.9 in. 684 mm / 26.9 in. 684 mm / 26.9 in. 684 mm / 26.9 in. 684 mm / 26.9 in. 665 mm / 26.2 in. 665 mm / 26.2 in.
Fuel Capacity 1.80 litres / 0.48 gallons 1.80 litres / 0.48 gallons 1.80 litres / 0.48 gallons 2.30 litres / 0.61 gallons 2.30 litres / 0.61 gallons 2.30 litres / 0.61 gallons 2.30 litres / 0.61 gallons 2.30 litres / 0.61 gallons 2.30 litres / 0.61 gallons 2.30 litres / 0.61 gallons 2.30 litres / 0.61 gallons 2.30 litres / 0.61 gallons 2.30 litres / 0.61 gallons 2.30 litres / 0.61 US gallons 2.30 litres / 0.61 US gallons 2.30 litres / 0.61 US gallons 2.30 litres / 0.61 US gallons
Stroke 2 2 2 2 - - - - - - - - - - - - 2-stroke
Ground Clearance (mm) 255 mm 255 mm 255 mm 255 mm 252 mm 252 mm 252 mm 252 mm 252 mm 252 mm 252 mm 252 mm 252 mm 252 mm 252 mm 252 mm 252 mm

Key Specifications

Engine

Single cylinder, two-stroke

Power

Not published by manufacturer

Torque

Not published by manufacturer

Top Speed

Not published by manufacturer

Weight

41.5 kg / 91.5 lbs

Fuel Capacity

2.30 litres / 0.61 US gallons

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Full 2023 KTM 50 SX Specifications

Comments Intended for children 4-10 years old.
Colours White/orange/grey
Ground Clearance (in.) 9.9 inches
Ground Clearance (mm) 252 mm
Seat Height 665 mm / 26.2 in.
Dry Weight 41.5 kg / 91.5 lbs
Fuel Capacity 2.30 litres / 0.61 US gallons
Stroke 2-stroke
Engine Type Single cylinder, two-stroke
Displacement (ci) 2.99 cubic inches
Displacement (cc) 49.0 cc
Bore x Stroke (in,) 1.6 x 1.6 inches
Bore x Stroke (mm) 39.5 x 40.0 mm
Fuel System Carburettor
Ignition Seletra 2p D36 EMS
Starter Kick
Clutch Centrifugal
Final Drive Chain   (final drive)
Gearbox Automatic
Primary Drive 1/2 x 3/16´ chain
Frame Type Central-tube frame with double-cradle
Suspension - Front XACT 35 WP Upside-Down fork, Ø 35 mm
Suspension - Rear XACT WP PDS mono shock
Rake 24.0°
Wheel Travel - Front 205 mm / 8.1 in.
Wheel Travel - Rear 185 mm / 7.3 in.
Brakes - Front Single disc
Brakes - Rear Single disc

Specifications are compiled from manufacturer documentation and cross-referenced technical sources, and corrected on an ongoing basis. Spot an error? Let us know.

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