
KTM 125 SX
Key specifications
Overview
Introducing the 2021 KTM 125 SX, a formidable contender in the enduro-offroad category that blends lightweight agility with high-performance engineering. Priced at an MSRP of US$ 7,399, this motorcycle is tailored for both aspiring riders and seasoned competitors who crave an exhilarating experience on the trails. KTM’s legacy in offroad racing is epitomized in the 125 SX, which showcases the brand's commitment to performance, durability, and cutting-edge technology—all designed to dominate the dirt. At the heart of the 125 SX is a potent 124.8 ccm single-cylinder, two-stroke engine that produces a spirited 15 HP (10.9 kW). This powerplant, featuring a precise fuel injection system and advanced Kokusan EMS ignition, delivers impressive throttle response and exhilarating acceleration. The 6-speed gearbox, complemented by a Brembo hydraulic multi-plate clutch, ensures smooth power delivery and seamless gear shifts, allowing riders to navigate through challenging terrains with confidence. With a lightweight design tipping the scales at just 87.5 kg (192.9 pounds), the 125 SX offers an exceptional power-to-weight ratio, enabling riders to tackle obstacles and curves with remarkable agility. The 2021 KTM 125 SX isn’t just about brute force; it’s equipped with advanced suspension and chassis technology that enhances both comfort and control. The central double-cradle frame, constructed from robust 25CrMo4 steel, provides unparalleled stability, while the WP XACT suspension system—featuring a 48 mm front fork and a linked monoshock rear—offers 310 mm of front travel and 300 mm of rear travel, ensuring that the bike soaks up bumps with ease. Additionally, the bike’s impressive ground clearance of 375 mm (14.8 inches) allows riders to traverse rocky trails without worry. Whether you’re a novice rider or a seasoned
Pros
- Lightweight Agility: Weighing just 87.5 kg, the 125 SX is easy to maneuver, making it ideal for both beginners and experienced riders.
- Powerful Engine: The potent two-stroke engine delivers impressive acceleration and throttle response, perfect for competitive riding.
- Advanced Suspension: The WP XACT suspension system provides excellent handling and comfort over rough terrain, enhancing the overall riding experience.
Cons
- Limited Power for Advanced Riders: While great for beginners, more experienced riders may find the 125cc engine lacks the power needed for high-speed racing.
- Kick Starter Only: The absence of an electric start may be less convenient for some riders, especially in challenging conditions.
- Height for Shorter Riders: With a seat height of 850 mm (33.5 inches), it may be a stretch for shorter riders, potentially affecting their confidence and control.
Technical details
Source specification data
- Make
- KTM
- Model
- 125 SX
- Price
- S
- $ 7399.
- P
- depends on country, taxes, accessories, etc.
- Category
- Enduro-offroad
- Starter
- Kick
- Color Options
- White/orange
- Power
- 15.0 HP (10.9 kW))
- Clutch
- Multi-plate clutch, Brembo hydraulics
- Gearbox
- 6-speed
- Ignition
- Kokusan EMS
- Driveline
- O Ring
- .
- Primary
- drive: 22:72.
- Fuel System
- Injection
- Bore X Stroke
- 54.0 x 54.5 mm (2.1 x 2.1 inches)
- Displacement
- 124.8 ccm (7.62 cubic inches)
- Cooling System
- Liquid
- Engine Details
- Single cylinder, two-stroke
- Lubrication System
- Wet sump
- Transmission Type Final Drive
- Chain
- Dry Weight
- 87.5 kg (192.9 pounds)
- Seat Height
- 850 mm (33.5 inches) If adjustable, lowest setting.
- Fuel Capacity
- 7.50 litres (1.98 gallons)
- Ground Clearance
- 375 mm (14.8 inches)
- Power Weight Ratio
- 0.1714 HP/kg
- Rake
- 26.1°
- Rear Tyre
- 150-17
- Frame Type
- Central
- double-cradle-type 25
- Mo4
- steel
- Front Tyre
- 110-17
- Rear Brakes
- Single disc
- Front Brakes
- Single disc
- Rear Suspension
- WP XACT Monoshock with linkage
- Front Suspension
- WP XACT-USD, Ø 48 mm
- Rear Wheel Travel
- 300 mm (11.8 inches)
- Front Wheel Travel
- 310 mm (12.2 inches)