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KTM 125 SX
2003Off-road

KTM 125 SX

Key specifications

Engine
125 cc
Weight
94 kg
Fuel type
petrol
Fuel capacity
2.0 L
Transmission
5-speed
Seat height
36 mm
Front brakes
Single disc
Rear brakes
Single disc

Overview

Introducing the 2003 KTM 125 SX, a vibrant contender in the competitive world of cross-motocross motorcycles. Renowned for its agile handling and lightweight construction, the 125 SX is tailored for riders seeking a blend of performance and thrill on both track and trails. With its striking orange and black livery, the 125 SX not only stands out visually but also represents KTM's commitment to racing pedigree and innovation. This model is particularly appealing to entry-level motocross enthusiasts and seasoned riders looking for a nimble machine to hone their skills. At the heart of the KTM 125 SX lies a potent single-cylinder, two-stroke engine with a displacement of 124.80 ccm. This powerplant delivers exhilarating performance, revving up with a lively character that is typical of KTM's racing lineage. The engine’s bore and stroke of 45.0 x 40.8 mm ensure quick throttle response and impressive acceleration, making it a blast to ride. Coupled with a 5-speed gearbox and liquid cooling, the 125 SX excels in delivering smooth power delivery, whether you’re navigating tight corners or powering down straightaways. Riders can expect a thrilling experience that blends power with precision, allowing for effortless maneuvers on the track. The 2003 KTM 125 SX is equipped with features that enhance its performance and rider experience. The advanced suspension setup includes a front travel of 300 mm and rear travel of 335 mm, ensuring superior handling over bumps and obstacles. Stopping power is provided by robust single-disc brakes with a 260 mm front and 220 mm rear diameter, giving riders confidence in their braking capabilities. The chassis is designed with a ground clearance of 390 mm and a seat height of 925 mm, catering to a variety of rider sizes while maintaining an aggressive stance. With a fuel capacity of 7.50 litres, you can enjoy extended riding sessions without frequent refueling stops. **

Pros

  • Lightweight design at 93.6 kg (206.4 pounds) enhances agility and maneuverability.
  • Responsive and powerful two-stroke engine delivers an exhilarating riding experience.
  • High-quality suspension components provide excellent handling and comfort on rough terrains.

Cons

  • Two-stroke engines may require more frequent maintenance compared to four-stroke counterparts.
  • Limited fuel capacity of 7.50 litres may necessitate more frequent stops on longer rides.
  • Higher seat height at 925 mm might be challenging for shorter riders to manage comfortably.

Technical details

Source specification data

Make
KTM
Model
125 SX
Category
Cross-motocross
Gearbox
5-speed
Fuel System
Carburettor
Bore X Stroke
45.0 x 40.8 mm (1.8 x 1.6 inches)
Displacement
124.80 ccm (7.62 cubic inches)
Cooling System
Liquid
Engine Details
Single cylinder, two-stroke
Transmission Type Final Drive
Chain
Dry Weight
93.6 kg (206.4 pounds)
Seat Height
925 mm (36.4 inches) If adjustable, lowest setting.
Fuel Capacity
7.50 litres (1.98 gallons)
Ground Clearance
390 mm (15.4 inches)
Rear Tyre
100/90-19
Front Tyre
80/100-21
Rear Brakes
Single disc
Front Brakes
Single disc
Rear Wheel Travel
335 mm (13.2 inches)
Front Wheel Travel
300 mm (11.8 inches)
Rear Brakes Diameter
220 mm (8.7 inches)
Front Brakes Diameter
260 mm (10.2 inches)