
KTM 125 SX
Key specifications
Overview
Introducing the 2005 KTM 125 SX, a standout in the competitive world of cross-motocross motorcycles. Designed for enthusiasts who crave speed, agility, and advanced engineering, the 125 SX is a prime choice for both novice riders and seasoned racers looking to dominate the tracks. With its lightweight build and a powerful two-stroke engine, this bike captures the essence of what it means to be a true motocross machine. Equipped with cutting-edge technology and a design ethos that focuses on performance, the 125 SX is poised to be a favorite for adrenaline junkies who thrive on the thrill of off-road racing. At the heart of the KTM 125 SX lies a robust single-cylinder, two-stroke engine with a displacement of 124.80 ccm, delivering a thrilling combination of power and responsiveness. The engine features a bore and stroke of 54.0 x 54.5 mm, ensuring a lively performance that allows riders to reach exhilarating speeds. The Keihin PWK 39 carburettor provides precise fuel delivery, while the Kokusan digital ignition system guarantees reliable starts and optimal performance. Coupled with a 5-speed gearbox and a wet multi-disc clutch operated hydraulically, the 125 SX offers exceptional control and smooth shifting, making it an exhilarating ride on the track or in the dirt. The chassis of the 125 SX is crafted from resilient chromium molybdenum, providing a lightweight yet sturdy foundation for intense riding experiences. The WP-USD front suspension with a generous 300 mm travel, paired with a WP-PDS-DA shock absorber at the rear with 335 mm travel, ensures that riders can tackle rough terrains with ease. Safety is paramount, and the bike features a dual-disc braking system, with a 216 mm front disc and a 260 mm rear disc, providing powerful stopping power when it matters most. With a ground clearance of 390 mm and a seat height of 925 mm, the bike strikes a balance between comfort and performance, allowing for better maneuverability on tricky trails. **
Pros
- Lightweight Design: At just 92.4 kg (203.7 pounds), the 125 SX is agile and easy to handle, making it perfect for tight corners and quick maneuvers.
- Powerful Engine Performance: The two-stroke engine delivers a thrilling ride, with quick acceleration and a responsive throttle that appeals to seasoned racers.
- Advanced Suspension System: With impressive front and rear suspension travel, the bike absorbs bumps and shocks, providing a smooth ride over rough terrain.
Cons
- Kick Starter Only: The absence of an electric start may be a drawback for some riders, as kick-starting can be challenging in certain situations.
- Less Torque at Low RPMs: The two-stroke engine may not provide the low-end torque some riders desire, requiring a more aggressive riding style to optimize power.
- Seat Height: With a seat height of 925 mm (36.4 inches), the bike may be less accessible for shorter riders, potentially limiting its appeal.
Technical details
Source specification data
- Make
- KTM
- Model
- 125 SX
- Category
- Cross-motocross
- Starter
- Kick
- Clutch
- Wet multi-disc clutch, operated hydraulically
- Gearbox
- 5-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
- 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°
- Trail
- 120 mm (4.7 inches)
- Frame Type
- chromium molybdenum
- Rear Brakes
- Single disc
- Front Brakes
- Single disc
- Rear Suspension
- WP-PDS-DA shock absorber
- Front Suspension
- WP-USD 48 mm (1.89 inch.)
- Rear Wheel Travel
- 335 mm (13.2 inches)
- Front Wheel Travel
- 300 mm (11.8 inches)
- Rear Brakes Diameter
- 260 mm (10.2 inches)
- Front Brakes Diameter
- 216 mm (8.5 inches)