The 2004 FLHRSI Road King is an iconic American cruiser, celebrated for its classic styling, comfortable touring capabilities, and the robust performance delivered by its Electronic Fuel Injection (EFI) system. This model, a variant of the renowned Road King line introduced in 1994, offers a distinct blend of traditional aesthetics with modern technological enhancements, making it a favored choice for riders who appreciate both heritage and reliability on extended journeys. Its V-twin engine, typically a 1450cc or 1550cc Twin Cam, provides ample power and torque for highway cruising, complemented by a 5-speed transmission and belt drive for smooth operation. This comprehensive service repair workshop manual is designed to be an indispensable resource for owners, mechanics, and technicians working on the 2004 FLHRSI Road King. It covers a wide array of critical systems, including general information, maintenance schedules, chassis components, fuel and cooling systems, engine, clutch, transmission, wheels, brakes, suspension, steering, frame, and the entire electrical system with detailed wiring diagrams. The manual provides step-by-step instructions for routine maintenance, complex troubleshooting, and major repairs, ensuring that all aspects of the vehicle can be properly serviced and maintained to factory specifications, thereby promoting longevity and optimal performance.