This comprehensive Yamaha XS650SF XS650-2F 1979 Service Repair Workshop Manual provides detailed instructions for servicing and repairing your motorcycle. It is a valuable resource for both experienced mechanics and DIY enthusiasts. This manual offers step-by-step guidance, diagrams, illustrations, wiring schematics, and specifications to enable you to perform a wide range of maintenance and repair tasks. The manual covers various aspects of your motorcycle, from routine maintenance like lubrication and periodic checks to more complex repairs like engine removal and installation, fuel system troubleshooting, and electrical system diagnosis. It also includes detailed information on the cooling system, transmission, drive chain, sprockets, steering system, shocks, bodywork, intake & exhaust, and advanced troubleshooting techniques. With clear and concise text combined with illustrative diagrams, this manual makes it easy to understand and follow the repair procedures. This manual is written by Yamaha, ensuring accuracy and reliability, and will empower you to save money and gain valuable knowledge about your motorcycle.

The Yamaha XS650SF and XS650-2F motorcycles, produced in 1979, represent a significant chapter in Yamaha's history, marking a transition from the classic air-cooled two-cylinder design to a more modern, fuel-injected era. These models, particularly the XS650SF, showcased Yamaha's commitment to innovation by incorporating cutting-edge technology for the time. The XS650SF featured a fuel-injected engine, a first for Yamaha in this class, which aimed to enhance performance, efficiency, and emissions control. The XS650-2F, while retaining the carburetor system, benefited from updates in the engine, transmission, and other components, achieving a smoother ride with improved reliability. Both motorcycles were designed to cater to a diverse range of riders, from casual commuters to weekend enthusiasts, offering a blend of power and comfort. The 1979 Yamaha XS650SF and XS650-2F were powered by a 650cc air-cooled, parallel-twin engine with a 4-stroke, 8-valve configuration. The fuel-injected SF model utilized Yamaha's proprietary "CV" (Constant Velocity) carburetor system, which aimed to deliver a more consistent fuel mixture and improved throttle response. The engine featured a dual-overhead camshaft design, with pushrod actuation, and a 5-speed transmission. The motorcycle's frame was constructed from a steel double cradle design, providing a solid and stable platform for its iconic styling. The XS650SF and XS650-2F were known for their smooth power delivery, making them enjoyable for both city riding and longer trips. Their classic design, highlighted by the chrome-plated exhaust system and tank-mounted speedometer, appealed to a wide audience, further solidifying their place as a popular choice for both enthusiasts and everyday commuters.