This comprehensive service and repair manual is an essential resource for owners of the BMW R1100RT, R1100RS, R850/1100GS, and R850/1100R motorcycles. It provides detailed instructions and illustrations for every aspect of maintenance and repair, from routine servicing to complete engine rebuilds. The manual covers everything you need to know to keep your BMW running smoothly, including: * **Engine and Transmission:** Detailed diagrams and step-by-step instructions for dismantling, rebuilding, and adjusting the engine and transmission. This includes information on valve timing, cylinder head removal and replacement, crankshaft and connecting rod replacement, and more. * **Electrical System:** Comprehensive coverage of the electrical system, including wiring diagrams, troubleshooting guides, and repair procedures for components like the alternator, starter, ignition system, and lighting. * **Chassis and Suspension:** In-depth information on the motorcycle's chassis, suspension, and braking systems. This includes detailed instructions for adjusting and repairing the suspension components, brakes, wheels, and tires. * **Bodywork and Accessories:** The manual also includes instructions for removing, reinstalling, and repairing the motorcycle's bodywork, including fairings, seat, and luggage systems. * **Troubleshooting and Diagnostic Guides:** The manual features extensive troubleshooting guides to help you diagnose and solve problems with your motorcycle. This service manual is a valuable resource for both novice and experienced mechanics. Whether you're performing routine maintenance or tackling a major repair, this manual will guide you through every step of the process.

The BMW R1100RT, R1100RS, R850/1100GS, and R850/1100R represent a pivotal era in BMW's motorcycle history, offering a blend of touring comfort, sportbike performance, and off-road capability. These models, produced between 1993 and 2006, were powered by BMW's iconic air-cooled, horizontally opposed "boxer" twin-cylinder engine. Each model catered to a distinct riding style: the R1100RT was a luxurious touring machine designed for long-distance comfort, featuring a full fairing, spacious seating, and ample luggage capacity. The R1100RS, with its sporty styling and aggressive riding position, targeted the sport touring enthusiast. The R850/1100GS, equipped with long-travel suspension, knobby tires, and a high ground clearance, was a capable off-roader, perfect for adventurous rides. Lastly, the R850/1100R, a naked sportbike with a lighter frame and higher horsepower output, offered a pure and exhilarating riding experience. These BMW models incorporated various innovative features that were groundbreaking for their time. The R1100RT, for instance, was the first motorcycle to offer an optional electronically controlled suspension system known as "ESA" (Electronic Suspension Adjustment), allowing riders to adjust the suspension damping and preload for optimal comfort and handling. The R850GS and R1100GS introduced BMW's innovative Telelever front suspension system, which provided superior handling and braking performance compared to conventional telescopic forks. The powerful boxer engines were known for their smooth power delivery, reliability, and durability, making these motorcycles popular choices for both daily commuting and long-distance touring. With their unique blend of performance, comfort, and reliability, these BMW models played a significant role in shaping the modern motorcycle landscape.