What category is the 2023 KTM 125 SX?

The 2023 KTM 125 SX has a Category of Enduro / offroad.

What is the engine size of the 2023 KTM 125 SX?

The 2023 KTM 125 SX has a Capacity: of 124.8 ccm (7.62 cubic inches).

What type of engine does the 2023 KTM 125 SX have?

The 2023 KTM 125 SX has a Engine type of Single cylinder, two-stroke.

What is the engine power of the 2023 KTM 125 SX?

The 2023 KTM 125 SX has a Power of 15.0 HP (10.9 kW).

Is the 2023 KTM 125 SX air cooled or liquid cooled?

The 2023 KTM 125 SX has a Cooling system of Liquid.

How many gears does the 2023 KTM 125 SX have?

The 2023 KTM 125 SX has a Gearbox of 6-speed.

How much does the 2023 KTM 125 SX weigh?

The 2023 KTM 125 SX has a Dry weight of 92.4 kg (203.7 pounds).

What is the seat height of the 2023 KTM 125 SX?

The 2023 KTM 125 SX has a Seat height of 958 mm (37.7 inches) If adjustable, lowest setting..

KTM 125 SX - 2023 Specifications and Reviews

The 2023 KTM 125 SX is a lightweight two-stroke offroad machine designed for young riders and beginners stepping up to competitive motocross. Its nimble 124.8cc engine delivers responsive power with minimal weight, making it ideal for learning proper technique on the track. Known for its sharp handling and KTM's proven reliability, the 125 SX remains the entry-level choice for aspiring motocross racers.

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2023

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General information
Category	Enduro / offroad
Year	2023
Model	KTM 125 SX
Engine and Transmission Specifications
Driveline	X-Ring 5/8 x 1/4Â´ chain
Clutch	Wet multi-disc DS clutch, Brembo hydraulics
Transmission type	Chain (final drive)
Gearbox	6-speed
Cooling system	Liquid
Lubrication system	Wet sump
Ignition	Vitesco Technologies EMS
Fuel system	Injection
Bore x Stroke	54.0 x 54.5 mm (2.1 x 2.1 inches)
Power	15.0 HP (10.9 kW)
Engine type	Single cylinder, two-stroke
Capacity:	124.8 ccm (7.62 cubic inches)
Brakes, suspension, Frame and wheels
Rear brakes	Single disc
Diameter	260 mm (10.2 inches)
Front brakes	Single disc
Rear tire	2.15-19
Front tire	1.6-21
Rear wheel travel	300 mm (11.8 inches)
Rear Suspension	WP XACT Monoshock with linkage
Front wheel travel	310 mm (12.2 inches)
Front Suspension	WP XACT-USD, Ã˜ 48 mm
Rake (fork angle)	26.1°
Frame type	Central double-cradle-type 25CrMo4 steel

Physical measures and capacities
Fuel capacity	7.20 litres (1.90 US gallons)
Ground clearance	359 mm (14.1 inches)
Seat height	958 mm (37.7 inches) If adjustable, lowest setting.
Power/weight ratio	0.1623 HP/kg
Dry weight	92.4 kg (203.7 pounds)

Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay
Starter	Electric
Color options	White/orange/grey

Performance Profile & Rider Fit

Best For

Track95%

City10%

Cornering90%

Daily Riding10%

Touring8%

Passenger5%

Rider Profile

Best For	This is a full-on motocross competition bike best suited to intermediate through expert off-road riders, not beginners or casual road riders.
Purpose	Built purely for closed-course motocross racing, it excels at jumps, berms, and rapid direction changes on dirt tracks rather than any street use.
Rider Fit	The tall 958 mm seat height, aggressive ergonomics, and demanding 2-stroke power delivery require good rider fitness, strength, and prior dirt bike experience.
Character	Light, explosive, and razor-sharp in handling, it rewards aggressive riding with a peaky two-stroke power band and minimal weight to manage.
Not Ideal For	It is not suitable for commuting, highway travel, passengers, or riders seeking comfort, storage, or a forgiving low-end power delivery.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2023 KTM 125 SX Rider Ergonomics Assessment

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Feet:

At 958mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2023 KTM 125 SX, with a cramped knee angle of around 85 degrees and an upright riding position.

Data quality: estimated (wheelbase estimated from this category's typical bike, not this model's own spec). Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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Rider Reviews

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MotorcycleDB Review

The 2023 KTM 125 SX is a powerful and agile motocross bike that is sure to impress both amateur and professional riders. With its lightweight frame and top-of-the-line suspension, this bike offers excellent handling and maneuverability on the track. The 125cc engine provides plenty of power, allowing riders to conquer even the most challenging of courses. Additionally, the bike's sleek and modern design is sure to turn heads both on and off the track. Overall, the 2023 KTM 125 SX is a fantastic choice for anyone looking for a high-performance motocross bike. In conclusion, the 2023 KTM 125 SX is a top-of-the-line motocross bike that offers exceptional performance and handling. Whether you're a seasoned pro or just starting out in the sport, this bike is sure to impress with its powerful 125cc engine and agile maneuverability on the track. Additionally, the bike's sleek and modern design is sure to make a statement wherever you go. Overall, the 2023 KTM 125 SX is a fantastic choice for anyone looking for a high-performance motocross bike that can handle anything the track throws at it.