2023 KTM 300 SX Specifications

Name: 2023 KTM 300 SX
Brand: KTM

Cross / motocross • Specs last verified 13 July 2026

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2023 KTM 300 SX Overview

For 2023, KTM offers the 300 SX as a cross / motocross motorcycle with 293.2 cc on tap. The 2023 KTM 300 SX is built around a Single cylinder, two-stroke engine. Internally, bore and stroke are 72 x 72 mm. In everyday use, the 2023 300 SX tips the scales at 99.4 kg, carries a 7.20-litre fuel tank, offers a seat height of 958 mm and spans a 1482 mm wheelbase. Every technical detail, from suspension travel to tyre sizes, is covered in the full 2023 KTM 300 SX spec sheet below.

2023 300 SX - Pros & Cons

Strengths

Fuel injection: No choke, no jetting, no altitude compensation to think about - fuel injection just works across a wider range of conditions than carburetion.

Considerations

Tall seat height: A 958 mm seat puts flat-footing out of reach for a lot of riders - sit on it in person before committing.
Modest fuel capacity: A 7.20-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

Fuelling & injector care

Fuelling on the 300 SX comes from fuel injection. Cold starts and throttle response stay consistent across altitude and temperature, the main practical edge over a carbureted equivalent.

Brake disc and pad wear

Single disc. Brembo 2-piston floating caliper 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 WP XACT-USD, Ø 48 mm up front and WP XACT Monoshock with linkage 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 300 SX means routine lubing and tension checks are part of ownership - skip them and sprocket wear accelerates noticeably.

Frame & chassis check

The Central double-cradle-type 25CrMo4 steel 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 300 SX's 99.4 kg kerb weight makes low-speed control noticeably less effort than on a heavier machine.

300 SX - Buying & Maintenance Guide

What to check before buying

A pre-purchase check on the 2023 KTM 300 SX 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 300 SX settles to a smooth idle within seconds.

Oil and filter changes

Oil changes are the cheapest insurance you can buy for a 300 SX's engine - keep to the manufacturer's interval rather than stretching it. Use the viscosity grade the manual specifies, not whatever's on sale.

Fuel system care

Injector systems like the 300 SX's hold up well with basic care - decent fuel, an occasional cleaner additive, and draining old fuel before any layup longer than three months.

2023 KTM 300 SX - Frequently Asked Questions

What engine does the 2023 KTM 300 SX have?

The 2023 KTM 300 SX uses a Single cylinder, two-stroke engine with 293.2 cc of displacement.

How much does the 2023 KTM 300 SX weigh?

The 2023 KTM 300 SX weighs 99.4 kg. This is the manufacturer's dry figure.

What is the fuel tank capacity of the 2023 KTM 300 SX?

The 2023 KTM 300 SX has a 7.20-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 120-144 km between stops.

Is the 2023 KTM 300 SX suitable for shorter riders?

The 2023 KTM 300 SX has a seat height of 958 mm. This is towards the tall end of the spectrum and will require most riders under 175 cm to tiptoe at stops.

What brakes does the 2023 KTM 300 SX have?

The 2023 KTM 300 SX uses Single disc. Brembo 2-piston floating caliper at the front and Single disc. Brembo single-piston floating calliper, brake disc at the rear.

What tyre sizes does the 2023 KTM 300 SX use?

The front tyre size on the 2023 KTM 300 SX is 1.60-21.

What fuel system does the 2023 KTM 300 SX use?

The 2023 KTM 300 SX uses Injection, providing precise fuelling across the rev range and reliable cold-start behaviour.

Key Specifications

Engine

Single cylinder, two-stroke

Power

Not published by manufacturer

Torque

Not published by manufacturer

Top Speed

Not published by manufacturer

Weight

99.4 kg / 219.1 lbs

Fuel Capacity

7.20 litres / 1.90 US gallons

Full 2023 KTM 300 SX Specifications

Colours Orange/white/grey

Ground Clearance (in.) 13.9 inches

Ground Clearance (mm) 354 mm

Seat Height 958 mm / 37.7 in.

Wheelbase 1482 mm / 58.3 in.

Dry Weight 99.4 kg / 219.1 lbs

Fuel Capacity 7.20 litres / 1.90 US gallons

Stroke 2-stroke

Engine Type Single cylinder, two-stroke

Displacement (ci) 17.89 cubic inches

Displacement (cc) 293.2 cc

Bore x Stroke (in,) 2.8 x 2.8 inches

Bore x Stroke (mm) 72.0 x 72.0 mm

CO2 64.7 CO2 g/km. (CO2 - Carbon dioxide emission)

Fuel System Injection

Fuel Consumption 2.79 litres/100 km (35.8 km/l or 84.31 mpg)

Ignition Vitesco Technologies EMS

Starter Electric

Clutch Wet, DDS multi-disc clutch, Brembo hydraulics

Final Drive Chain (final drive)

Gearbox 5-speed

Primary Drive X-Ring 5/8 x 1/4´ chain

Frame Type Central double-cradle-type 25CrMo4 steel

Suspension - Front WP XACT-USD, Ø 48 mm

Suspension - Rear WP XACT Monoshock with linkage

Rake 26.5°

Wheel Travel - Front 300 mm / 11.8 in.

Wheel Travel - Rear 310 mm / 12.2 in.

Brakes - Front Single disc. Brembo 2-piston floating caliper

Brakes - Rear Single disc. Brembo single-piston floating calliper, brake disc

Tyres - Front 1.60-21

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