The 2006 Softail models represent a sophisticated evolution of the iconic cruiser, known for their distinctive styling and powerful V-twin engines. These motorcycles, including variants such as the FLSTC Heritage Softail, FLSTF Fat Boy, FLSTN Softail Deluxe, FLSTSC Softail Springer Classic, FXST Softail Standard, FXSTD Softail Deuce, and FXSTS Springer Softail, are powered by air-cooled Twin Cam 88 engines, typically displacing 96 cubic inches. They feature a 5-speed transmission and a robust chassis designed for comfortable long-distance riding and a smooth aesthetic, mimicking the appearance of a hardtail frame. The legacy of craftsmanship is evident in these models, which continue to be celebrated for their engineering quality and the unique riding experience they offer. This comprehensive workshop service and repair manual, along with its electrical diagnostics component, provides in-depth guidance for owners, DIY mechanics, and professional technicians. Spanning 1195 pages and presented in English, it covers all aspects of maintenance, repair, overhaul, and restoration for the 2006 Softail range. Detailed procedures for major systems including the engine, fuel system (both carbureted and EFI), transmission, chassis, and electrical components are meticulously explained. The manual includes extensive troubleshooting guides, clear diagrams, torque specifications, maintenance schedules, and electrical schematics, making it an indispensable resource for ensuring the optimal performance and longevity of your Softail.