This manual covers the F650GS, F800GS, F800S, and F800ST models from the 2009, 2010, and 2011 model years, all built upon the F800 platform. These versatile motorcycles, powered by a shared 798cc parallel-twin engine, are known for their robust engineering and dynamic performance, catering to a range of riding experiences from commuting to adventure touring. The F800 series offers a blend of modern technology, including electronic fuel injection and optional ABS, with the reliability and build quality expected. This comprehensive service repair manual, exceeding 3000 pages, provides detailed guidance for the maintenance, diagnosis, and repair of these motorcycles. It covers all major systems, including the engine mechanicals, drivetrain, chassis, suspension, brakes, and electrical systems, with in-depth procedures for routine maintenance, component removal and installation, and complete rebuilds. The manual is designed for both DIY enthusiasts and professional technicians, offering clear instructions, detailed illustrations, exploded diagrams, and hundreds of photos to ensure accurate and efficient upkeep of your F800 series.