This manual covers the K1100LT and K1100RS models from 1999. As part of the renowned K-series, these motorcycles are distinguished by their transverse-mounted, liquid-cooled inline-four engines, offering a sophisticated blend of sportiness and touring comfort. The K1100LT, or Langstrecken-Tourer, is designed for extended journeys, while the K1100RS, or Rennsport, provides a sportier riding experience. Both models are recognized for their robust engineering, reliable performance, and the hallmark build quality associated with the brand. This comprehensive service repair manual provides detailed, dealer-level information essential for the maintenance and repair of your K1100 motorcycle. It covers all major systems, including engine mechanicals, fuel injection, ignition, transmission, drivetrain, brakes, suspension, and electrical systems. The manual includes step-by-step repair instructions, diagnostic procedures, troubleshooting guides, and technical specifications. Its detailed content is designed to empower professional technicians and experienced enthusiasts, enabling them to perform all necessary service and repair tasks effectively and efficiently.