The BMW K1100LT and K1100RS, produced until 1999, represent the pinnacle of BMW's K Series four-valve technology, offering a potent blend of performance and touring capability. These motorcycles are renowned for their robust inline 4-cylinder, liquid-cooled engines, producing approximately 95-100 horsepower, coupled with a 5-speed manual transmission and shaft drive. The K1100LT, designed for luxury touring, often features integrated fairings, enhanced wind protection, and ample luggage capacity, while the K1100RS appeals to sport-touring enthusiasts. Acclaimed for their sophisticated engineering and comfortable ride, these models continue to be appreciated for their reliability and touring prowess. This comprehensive English-language service and repair manual provides detailed guidance for the complete service, repair, refurbishment, and restoration of the BMW K1100LT and K1100RS models. Covering all essential systems including engine, transmission, chassis, and electrical components, this manual offers step-by-step instructions, diagnostic procedures, and troubleshooting guides. With hundreds of detailed illustrations, exploded diagrams, photos, and wiring schematics, it empowers both do-it-yourself owners and professional mechanics to perform routine maintenance, adjustments, and complex repairs, ensuring the longevity and optimal performance of these iconic motorcycles.