7,799 $
Review 2023

2023 KTM 125 SX

  • Sold Worldwide:  1999-Present
  • Last Updated in = 2016

2023 KTM 125 SX Price in the USA:

KTM 125 SX 7,799 $

KTM 125 SX was introduced in 1999 as a cross motorcycle with a liquid-cooled, two-stroke engine. It received some updates in 2005 that included a wet multi-disc clutch and digital 2K-1 ignition. It was redesigned in 2006 with black rims and darker orange colour. It received many updates every year, and today the 2023 KTM 125 SX is the class-leading bike in 2-stroke Motorcross bikes. It has an easy suspension adjustment that enhances the smooth performance of the bike. It comes with an electric start technology that eases starting the motorcycle. The latest KTM 125 SX emphasizes mass centralization, which results in a lighter feel and more agile handling. An all-new frame in KTM 125 SX improves ground clearance, and the die-cast footpegs are less susceptible to hooking. The KTM 125 SX is a reliable bike with impressive power performance and makes two-stroke bikes preferable to four-stroke engines. The KTM 125 is also available in the Enduro category, but the KTM 125 SX is a Motorcross bike, lighter than 125 XC, which is preferable for longer trips. The KTM 125 SX is available in orange and offers various features that are discussed further in this article.

ktm 125 SX off road sports motorcycle off road jump
ktm 125 SX off road sports motorcycle off road jump

Engine & Performance:

The KTM 125 SX gets its power from a single cylinder, two-stroke, 124.8 cc engine that generates 37.5 hp power. It offers a six-speed transmission and comes with a wet multi-disc DS clutch. The electric start feature works efficiently; you only have to press the starter button, saving you time at signals. It offers easy suspension adjustment that allows the rider to adjust the speed settings from high to low in seconds. The forks at the end are adjusted easily through a single pressure preload valve. You will get optimal power at any altitude because of the Keihin Electronic fuel injection. The steering control is precise in KTM 125 SX and ensures a highly responsive action. It has a power valve and an electronic fuel injection that lets you use more power throughout the rev range for better traction. The new WP XACT shock absorbers in KTM 125 SX offers excellent consistency and maintains the stability of the ride. The ride’s stability is improved by the laser-cut frame that acts as a shock absorber that, results in less fatigue for the riders and smoother rides. The brakes at the front and rear are disc brakes and work efficiently to stop the bike smoothly at stops.

ktm 125 SX off road sports motorcycle engine view
ktm 125 SX off road sports motorcycle engine view

Fuel Economy & Top Speed:

It has a fuel tank capacity of 7.21 liters and gives 40 kilometers per liter mileage. It has a top speed of 85 miles (140 km) per hour.

Design & Build Quality:

The KTM 125 SX is one the most lightweight dirt bikes that delivers a confidence-inspiring ride. The KTM 125 SX has improved ergonomics that feature an improved rider triangle, knee contact, and gripping surfaces. The seat is flatter and has increased grip, improving rider movement and control. The all-new frame is designed to provide more rigidity and reposition the center of gravity. The polyamide aluminium subframe increases the rider’s feel and stability of the bike. The fork protection rings are redesigned to provide more protection against mud and dirt. The fenders are positioned at a height, and side panels surround the number plate at the front. The mudguard and the excel wheels are coloured black, while the orange colour of the bike gives it a retro look. The bike is designed to emphasize mass centralization for optimal operation and results in more agile handling of the bike. The 14.1 inches of ground clearance ensures efficient ride quality at all terrains, and the 37.7 inches of seat height is perfect for all riders to ride the bike comfortably. It has a dry weight of 92.4 kilograms. The bike’s build quality is good, and you don’t have to worry about its service cost.

User Reviews:

The KTM 125 SX is one of the best beginner dirt bikes, and most users have given good reviews. The users found its performance impressive, and its engine quality is much more reliable. The KTM 125 SX will always be top whenever we talk of off-road bikes. The lightweight of the bike makes its handling much easier, and users love riding it at high speeds. The bike’s reliability is appreciable, and users do not find any significant issues. The KTM 125 SX is popular in markets, so you don’t have to worry about its resale value as it has good resale value. The spare parts are also readily available from retailers.

Major Competitors:


  • TRANSMISSION : 6-speed
  • STARTER : Electric starter
  • STROKE : 54.5 mm
  • BORE : 54 mm
  • CLUTCH: Wet multi-disc DS clutch, Brembo hydraulics
  • DISPLACEMENT : 124.8 cm³
  • EMS : Vitesco Technologies EMS
  • DESIG : N1-cylinder, 2-stroke engine


  • WEIGHT (WITHOUT FUEL) : 92.4 kg
  • FRONT BRAKE : Disc brake
  • REAR BRAKE : Disc brake
  • CHAINX-Ring :  5/8 x 1/4″
  • FRAME DESIGN : Central double-cradle-type 25CrMo4 steel
  • REAR SUSPENSIONWP XACT :  Monoshock with linkage
  • SEAT HEIGHT : 958 mm

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