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KTM 125 SX
2007Off-road

KTM 125 SX

Key specifications

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

Overview

Introducing the 2007 KTM 125 SX, a fierce contender in the world of cross-motocross motorcycles. This lightweight and agile machine is engineered for serious riders who demand precision and performance on the track. With its high-revving two-stroke engine and nimble chassis, the 125 SX embodies KTM's racing pedigree, making it an ideal choice for both aspiring racers and seasoned professionals. Built to tackle the roughest terrains and deliver exhilarating rides, this bike is a testament to KTM's commitment to performance and innovation. At the heart of the 125 SX lies a powerful 124.8cc single-cylinder, two-stroke engine that provides ample torque and quick throttle response. The bore and stroke dimensions of 54.0 x 54.5 mm create a balanced powerband that's perfect for aggressive acceleration out of corners. The Keihin PWK 39 carburettor ensures precise fuel delivery, allowing riders to tap into the bike’s raw potential. Coupled with a 6-speed gearbox, the 125 SX offers seamless shifts that keep the power flowing smoothly, while the Kokusan digital ignition optimizes performance in various conditions. Riders will appreciate the liquid cooling system, which maintains optimal engine temperature, ensuring consistent performance during long rides or competitive races. The 2007 KTM 125 SX is not just about raw power; its advanced chassis and suspension technology set it apart from the competition. The central double-cradle frame, constructed from 25CrMo4 steel, provides exceptional rigidity and stability, allowing for precise handling. With a WP USD front suspension offering 115 mm of travel and a WP monoshock PDS at the rear with 185 mm of travel, this bike absorbs rough terrain with ease, enhancing rider confidence on the track. Additionally, the lightweight design at just 92.4 kg (203.7 pounds) means that the 125 SX is incredibly responsive, enabling nimble maneuvers and cornering prowess. With a ground clearance of 390 mm, riders can conquer obstacles without hesitation, while the 7.5-litre fuel tank ensures you can keep going without frequent stops. **

Pros

  • Lightweight and Agile: Weighing in at 92.4 kg, the 125 SX offers exceptional maneuverability and responsiveness on the track.
  • High-Performance Engine: The 124.8cc two-stroke engine delivers quick acceleration and impressive power, making it a strong competitor in races.
  • Superior Suspension: With advanced WP suspension components, the bike provides excellent handling and comfort over rough terrains.

Cons

  • Kick Start Only: The traditional kick-start mechanism may not appeal to all riders, especially those used to electric start systems.
  • Limited Fuel Capacity: With a fuel tank capacity of only 7.5 litres, long rides may require planning for fuel stops.
  • Height Considerations: The seat height of 925 mm may be challenging for shorter riders, potentially limiting accessibility.

Technical details

Source specification data

Make
KTM
Model
125 SX
Category
Cross-motocross
Starter
Kick
Clutch
Wet multi-disc clutch, operated hydraulically
Gearbox
6-speed
Ignition
Kokusan digital 2K-1
Fuel System
Carburettor. Keihin PWK 39
Bore X Stroke
54.0 x 54.5 mm (2.1 x 2.1 inches)
Displacement
124.80 ccm (7.62 cubic inches)
Cooling System
Liquid
Engine Details
Single cylinder, two-stroke
Exhaust System
Aluminium
Lubrication System
Mixture oil lubrication 1:40
Transmission Type Final Drive
Chain
Dry Weight
92.4 kg (203.7 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)
Rake
27.0°
Rear Tyre
100/90-19
Frame Type
Central double-cradle-type 25CrMo4
Front Tyre
80/100-21
Rear Brakes
Single disc
Front Brakes
Single disc
Rear Suspension
WP monoshock PDS
Front Suspension
WP USD, 43 mm
Rear Wheel Travel
185 mm (7.3 inches)
Front Wheel Travel
115 mm (4.5 inches)