This manual covers the BMW R Series motorcycles, specifically the R80, R90, and R100 models from the 1981 model year. These classic European boxer-twin motorcycles are celebrated for their engineering quality, reliability, and distinctive character, making them enduring choices for touring and general riding. The R Series represents a significant part of BMW Motorrad's heritage, known for its air-cooled boxer engines and shaft drive systems, offering a robust and engaging riding experience.

This comprehensive Factory Service and Repair Manual provides detailed information essential for the maintenance, diagnosis, and repair of your 1981 BMW R Series motorcycle. It covers all major systems, including engine mechanicals, fuel and ignition systems, transmission, electrical components, chassis, suspension, and braking systems. Within its pages, you will find step-by-step procedures for routine maintenance, troubleshooting common issues, detailed specifications and tolerances, and guidance on the use of special tools, ensuring your motorcycle remains in optimal condition.