This manual covers the 2006 Softail FLHRSI Road King Custom, a premium cruiser motorcycle renowned for its classic styling, touring capability, and distinctive custom elements. Powered by an air-cooled, Twin Cam 96 V-Twin engine with 1584cc displacement, this model offers robust performance and the iconic V-twin experience. Its engineering emphasizes reliability and rider comfort, making it suitable for both long-distance journeys and spirited riding. Key features include extensive chrome accents, custom detailing, and a comfortable riding position, embodying the heritage and craftsmanship associated with the brand. This comprehensive service and repair manual provides detailed guidance for the complete vehicle. It covers all major systems, including the engine, fuel, ignition, electrical, drivetrain, transmission, clutch, brakes, suspension, and frame. The manual includes step-by-step instructions for routine maintenance, component repair, disassembly and reassembly, troubleshooting common issues, and diagnostics, all supported by detailed diagrams and high-resolution illustrations. Its scope is suitable for both DIY enthusiasts and professional mechanics, offering precise torque specifications, wiring diagrams, and guidance on specialized tools, ensuring owners can effectively maintain and repair their FLHRSI Road King Custom.