The 1983 Harley-Davidson FXSB, also known as the Low Rider, is powered by a Shovelhead V-Twin engine and features a chain primary drive and belt final drive. This iconic cruiser model, introduced in 1977, is recognized for its distinctive styling and comfortable riding position, embodying a significant era for a brand established in 1903 and renowned for its cruiser and touring motorcycles. With a wheelbase of approximately 62.5 inches and a dry weight of around 560 lbs, the FXSB typically features dual disc front brakes and a single disc rear brake, adhering to the safety standards of its time. This comprehensive workshop service repair manual provides complete factory service and repair information for the 1983 Harley-Davidson FXSB. Covering hundreds of pages in English, it details the complete disassembly, repair, and reassembly of the Shovelhead engine, clutch, primary drive, transmission, kickstarter, fuel system, exhaust systems, electrical system, front and rear suspension, steering, and brakes. The manual includes systematic troubleshooting procedures, periodic lubrication schedules, maintenance guidelines, tune-up instructions, rebuild procedures, and detailed electrical wiring diagrams, offering essential guidance for DIY enthusiasts and professional mechanics alike to maintain and repair the vehicle effectively.