The KTM 125 SX Factory Service Repair Manual is an indispensable resource for anyone seeking to maintain, repair, or modify their KTM 125 SX motorcycle. This comprehensive manual offers a detailed and user-friendly guide to all aspects of the motorcycle, providing step-by-step instructions for every procedure, from basic maintenance tasks to complex repairs. It is designed to be a valuable reference for both professional mechanics and DIY enthusiasts, ensuring that all necessary information is readily available in a clear and concise manner. The manual covers a wide range of topics, including: * **Engine:** Disassembly, assembly, repair, and maintenance of the engine, including the cylinder head, crankshaft, pistons, connecting rods, and valve train. * **Transmission:** Detailed instructions on disassembling, assembling, and repairing the transmission, clutch, and gearbox. * **Suspension:** Comprehensive guidelines for servicing and repairing the front and rear suspension, including the forks, shock absorbers, and linkage. * **Electrical System:** A thorough explanation of the motorcycle's electrical system, covering the wiring diagram, battery, ignition system, and lighting components. * **Brakes:** Step-by-step instructions for maintaining and repairing the brake system, including the calipers, rotors, and master cylinders. * **Chassis:** Detailed information on the frame, swingarm, wheels, and other components of the motorcycle's chassis. * **Troubleshooting:** A comprehensive troubleshooting section to assist in identifying and resolving common problems. With clear diagrams, detailed instructions, and concise explanations, this service repair manual empowers you to confidently tackle any maintenance or repair task on your KTM 125 SX motorcycle.

The KTM 125 SX Factory is a high-performance motocross bike designed for serious riders seeking top-tier performance and handling. It embodies KTM's legendary dedication to racing pedigree, offering a potent combination of lightweight construction, a powerful 125cc engine, and a race-proven chassis. This machine is a true featherweight champion, weighing in at a mere 93.5 kg (206 lbs), making it incredibly agile and responsive both on the track and in the air. The 125 SX Factory boasts a chromoly steel frame, WP XACT suspension with AER technology, and a robust Brembo braking system, ensuring exceptional control and stability, even in the most demanding conditions. The heart of the 125 SX Factory is its liquid-cooled, 124cc, single-cylinder, two-stroke engine. This powerplant is renowned for its lightning-fast throttle response and impressive power delivery, making it a joy to ride. Its compact design and lightweight construction contribute to the bike's overall agility, allowing riders to push the limits in tight corners and navigate challenging terrain with ease. The 125 SX Factory is not just about raw power; it's about precise control and handling. Featuring a WP XACT 48 mm upside-down fork with AER technology in the front and a WP XACT shock absorber in the rear, this bike offers exceptional suspension performance, allowing riders to maintain their momentum and absorb the roughest terrain with confidence. The Brembo brakes provide the stopping power necessary for quick reactions and safe riding, ensuring complete control even at high speeds. This combination of power, lightness, and control makes the KTM 125 SX Factory a formidable competitor in the motocross arena.