The KLX140 and KLX140L are versatile off-road motorcycles designed for trail riding and recreational use, catering to both entry-level and intermediate riders. These models are powered by a reliable, air-cooled, four-stroke, 138 cc single-cylinder engine, known for its user-friendly operation and durability. The KLX140 features a lightweight and maneuverable chassis with long-travel suspension for handling various off-road terrains, while the KLX140L offers enhanced capability with longer suspension travel and a taller seat height. Engineered with renowned quality, these motorcycles provide an accessible and enjoyable off-road experience, making them a popular choice in their segment. This comprehensive workshop service repair manual provides detailed guidance for the KLX140 and KLX140L models from 2008 to 2015. It covers all variants, ensuring thorough support for maintenance, troubleshooting, and repair. Within its pages, you will find in-depth procedures for the engine, fuel system, ignition, transmission, cooling, exhaust, suspension, braking, electrical systems, wheels, tires, and bodywork. The manual includes essential information on scheduled maintenance, diagnostic steps for common issues, complete overhaul instructions, installation guidance, critical technical specifications, and clear wiring diagrams. This resource is an indispensable tool for owners, mechanics, and technicians seeking to maintain and repair these motorcycles effectively.