The K1100LT and K1100RS represent a pinnacle of German engineering, offering exceptional performance and comfort for both long-distance touring and sport touring. Produced from approximately 1991 to 1999, these motorcycles are characterized by their powerful 1093cc inline four-cylinder engines, smooth shaft drive, and advanced aerodynamic fairings, particularly on the LT model which features integrated luggage systems. Renowned for their engineering quality and reliability, the K1100 series was a significant evolution from its predecessors, providing a refined riding experience and establishing a strong reputation in the luxury sport touring segment, often compared favorably to competitors like the Honda Gold Wing. This comprehensive workshop service manual provides detailed technical information and procedural guidance for the K1100LT and K1100RS models. It covers all essential systems, including engine mechanicals, fuel injection, drivetrain, chassis, brakes, and electrical components, along with detailed maintenance schedules and fluid specifications. The manual offers step-by-step repair instructions, diagnostic procedures, troubleshooting guides, and crucial torque specifications, all presented with high-resolution diagrams and photographs. This resource is indispensable for owners, mechanics, and technicians seeking to maintain, diagnose, and repair these iconic motorcycles to the highest standards.