This manual covers the 2005 Softail, a line of motorcycles renowned for its iconic American styling and the distinctive look of a hardtail frame with hidden rear suspension. The Softail platform, with its V-Twin, air-cooled engines, offers a powerful and engaging riding experience. This comprehensive guide details various Softail models, including the Springer, Standard, Deuce, Night Train, Fat Boy, Heritage Softail Classic, and Softail Deluxe, encompassing both Electronic Fuel Injection (EFI) and non-EFI variants. The legacy of quality craftsmanship and rider community is reflected in the enduring appeal of the Softail series, designed for cruising and personal expression. This Service and Electrical Diagnostic Manual Set provides extensive information for owners and technicians. It details mechanical systems such as the engine, fuel system, drive train, transmission, chassis, brakes, and suspension, alongside electrical systems including starting, charging, instruments, ignition, and engine management. The manual includes step-by-step maintenance procedures, fluid specifications, troubleshooting guides, and detailed electrical diagnostics, covering everything from routine service to in-depth repairs. With over 1100 pages of high-resolution content, it empowers users to maintain, diagnose, and repair their 2005 Softail, offering significant value for DIY enthusiasts and professional mechanics alike.