2023 KTM 50 SX Factory Specifications

Name: 2023 KTM 50 SX Factory
Brand: KTM

Minibike, cross • Specs last verified 13 July 2026

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2023 KTM 50 SX Factory Overview

For 2023, KTM offers the 50 SX Factory as a minibike, cross motorcycle with 49 cc on tap. The 2023 KTM 50 SX Factory is built around a Single cylinder, two-stroke engine. Internally, bore and stroke are 39.5 x 40 mm. In everyday use, the 2023 50 SX Factory tips the scales at 41.5 kg, carries a 2.30-litre fuel tank and offers a seat height of 665 mm. Every technical detail, from suspension travel to tyre sizes, is covered in the full 2023 KTM 50 SX Factory spec sheet below.

2023 50 SX Factory - Pros & Cons

Strengths

Accessible seat height: At just 665 mm, flat-footing at a stop is easy for most riders - a genuine confidence builder for less experienced owners.

Considerations

Carburetor fuelling: Carburetion is more hands-on than fuel injection - plan on periodic jetting and cleaning as part of routine ownership.
Modest fuel capacity: A 2.30-litre tank keeps things light but means budgeting for more frequent fuel stops on any longer ride.
Chain final drive upkeep: A chain drivetrain is the most common setup in its class, but it's also the one that demands the most regular hands-on maintenance.

Wear Points & Servicing Notes

Carburetor maintenance

Being carbureted, the 50 SX Factory is more sensitive to stale fuel and altitude changes than a fuel-injected bike - a carb clean and rejet restores crisp throttle response after any extended lay-up.

Brake disc and pad wear

Single disc up front provides the primary stopping power; inspect disc thickness and pad wear at each tyre change to catch scoring before it becomes a rotor replacement.

Suspension condition on used examples

Suspension duties are handled by XACT 35 WP Upside-Down fork, Ø 35 mm up front and XACT WP PDS mono shock at the rear. Weeping fork seals aren't a dealbreaker on a used bike, but they're a fair basis for negotiating price.

Final drive maintenance

Chain final drive on the 50 SX Factory means routine lubing and tension checks are part of ownership - skip them and sprocket wear accelerates noticeably.

Frame & chassis check

The Chrome-molybdenum steel central-tube frame chassis holds up well with normal use; on a used bike it's still worth checking the head-stock and swingarm pivot area for impact damage or corrosion.

Low-speed handling

The 50 SX Factory's 41.5 kg kerb weight makes low-speed control noticeably less effort than on a heavier machine.

50 SX Factory - Buying & Maintenance Guide

What to check before buying

A pre-purchase check on the 2023 KTM 50 SX Factory should cover the same ground every time: service history, chain and sprocket condition, and any oil seepage around the casings. Start it from cold if you can - a well-kept 50 SX Factory settles to a smooth idle within seconds.

Oil and filter changes

Oil changes are the cheapest insurance you can buy for a 50 SX Factory's engine - keep to the manufacturer's interval rather than stretching it. Use the viscosity grade the manual specifies, not whatever's on sale.

Carburetor upkeep

A 50 SX Factory that's sat unused is almost always a carb-cleaning job before it runs right again - float bowls and pilot jets first, since they clog before anything else.

2023 KTM 50 SX Factory - Frequently Asked Questions

What engine does the 2023 KTM 50 SX Factory have?

The 2023 KTM 50 SX Factory uses a Single cylinder, two-stroke engine with 49 cc of displacement.

How much does the 2023 KTM 50 SX Factory weigh?

The 2023 KTM 50 SX Factory weighs 41.5 kg. This is the manufacturer's dry figure.

What is the fuel tank capacity of the 2023 KTM 50 SX Factory?

The 2023 KTM 50 SX Factory 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 Factory suitable for shorter riders?

The 2023 KTM 50 SX Factory has a seat height of 665 mm. This is a comfortable, accessible height for most riders.

What brakes does the 2023 KTM 50 SX Factory have?

The 2023 KTM 50 SX Factory uses Single disc at the front and Single disc at the rear.

What fuel system does the 2023 KTM 50 SX Factory use?

The 2023 KTM 50 SX Factory uses Carburettor, providing precise fuelling across the rev range and reliable cold-start behaviour.

What suspension does the 2023 KTM 50 SX Factory have?

The 2023 KTM 50 SX Factory uses XACT 35 WP Upside-Down fork, Ø 35 mm up front and XACT WP PDS mono shock at the rear.

KTM 50 SX Factory Spec Evolution

The KTM 50 SX Factory was produced across 3 model years (2021-2023). 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	2021	2022	2023
Displacement (cc)	49.8 cc	49.0 cc	49.0 cc
Displacement (ci)	3.04 cubic inches	2.99 cubic inches	2.99 cubic inches
Frame Type	Central-tube frame with double-cradle	25CrMo4 steel central-tube frame	Chrome-molybdenum steel central-tube frame
Suspension - Rear	XACT WP mono shock	XACT WP mono shock	XACT WP PDS mono shock
Colours	White/Orange/Blue/Red	White/orange/red/blue/green	White/orange/grey
Wheel Travel - Rear	185 mm / 7.3 in.	180 mm / 7.1 in.	185 mm / 7.3 in.
Ignition	Seletra 2p D36 EMS	Seletra 2p D36	Seletra 2p D36 EMS

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

Full 2023 KTM 50 SX Factory Specifications

Comments Intended for children 4-10 years old. Special Factory Edition.

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

Engine Detail Reed-valve

Fuel System Carburettor

Exhaust FMF silencer

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 Chrome-molybdenum steel central-tube frame

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

Rims Dunlop Geomax MX 53 tires

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