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KTM 125 SX
2010Off-road

KTM 125 SX

Key specifications

Engine
125 cc
Weight
91 kg
Fuel type
petrol
Fuel capacity
2.1 L
Transmission
6-speed
Seat height
39 mm
Front brakes
Single disc
Rear brakes
Single disc

Overview

Introducing the 2010 KTM 125 SX, a standout contender in the competitive landscape of the enduro-offroad category. Designed specifically for motocross enthusiasts and off-road adventurers, this lightweight machine epitomizes KTM's commitment to performance and agility. With its striking orange hue and aggressive styling, the 125 SX is not just a bike; it’s a statement of intent for those looking to dominate the trails and tracks alike. Whether you’re a budding racer or a seasoned rider seeking a nimble companion for weekend escapades, the 125 SX is engineered to deliver an exhilarating ride. At the heart of the 2010 KTM 125 SX lies a potent 124.8 cc single-cylinder, two-stroke engine that exemplifies the spirit of racing. Its 54.0 x 54.5 mm bore and stroke dimensions ensure a balanced power delivery, while the Keihin PWK 39 carburetor optimizes fuel intake for unmatched throttle response. Riders will appreciate the liquid cooling system that keeps temperatures in check, allowing for sustained performance even during intense rides. Paired with a smooth 6-speed gearbox and a hydraulic wet multi-disc clutch, the 125 SX provides seamless gear transitions, enabling riders to harness its power efficiently. The result? A thrilling acceleration and top-end performance that makes every ride a heart-pounding adventure. Beyond its impressive engine, the 125 SX boasts advanced suspension and handling technology that sets it apart in its class. The central double-cradle frame made from 25CrMo4 steel ensures rigidity and lightness, contributing to the bike’s low weight of just 90.8 kg (200.2 pounds). The WP USD front suspension with 300 mm travel and the WP PDS rear shock absorber with 335 mm travel work in harmony to absorb the bumps and jumps of rugged terrain, providing an agile and responsive ride. Riders will also enjoy the confidence inspired by the robust braking system, featuring a 260 mm front disc and a 220 mm rear disc, ensuring reliable stopping power when navigating tricky trails. With a ground clearance of 390 mm and a seat height of 985 mm, the 125 SX is suited for a variety of rider sizes, making it an accessible option for many. **

Pros

  • Lightweight and agile: The 125 SX is easy to maneuver, making it perfect for tight trails and technical sections.
  • Powerful engine: The two-stroke engine provides exhilarating acceleration and responsiveness, ideal for competitive riding.
  • Advanced suspension: The high-quality WP suspension components offer excellent travel and handling, enhancing rider confidence on rough terrain.

Cons

  • Kick start only: Some riders may find the lack of an electric start inconvenient, especially in tough conditions.
  • Limited fuel capacity: With an 8.00-litre tank, frequent refueling may be necessary during long rides or races.
  • Seat height: At 985 mm, the seat height may be a challenge for shorter riders, potentially affecting their confidence and control.

Technical details

Source specification data

Make
KTM
Model
125 SX
Category
Enduro-offroad
Starter
Kick
Comments
Offroad Competition model
Color Options
Orange
Clutch
Wet multi-disc clutch, operated hydraulically
Gearbox
6-speed
Ignition
Kokusan
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
Dry Weight
90.8 kg (200.2 pounds)
Seat Height
985 mm (38.8 inches) If adjustable, lowest setting.
Fuel Capacity
8.00 litres (2.11 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 PDS shock absorber
Front Suspension
WP USD, 43 mm
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)

Available colors

Orange