This manual covers the BMW R80, R90, and R100 motorcycle models from 1979. These iconic air-cooled boxer twins are celebrated for their robust engineering, reliability, and distinctive riding experience, embodying BMW's rich heritage in motorcycle manufacturing. The R80, R90, and R100 series represent a significant evolution in the 'Airhead' lineage, offering displacements ranging from approximately 800cc to 1000cc, with engine codes such as 247 and 248. These motorcycles are equipped with dual Bing carburetors, a 5-speed manual gearbox, and shaft drive, making them capable machines for both touring and everyday use.

This comprehensive service and repair manual provides essential, in-depth technical information for maintaining and repairing these classic BMW motorcycles. It covers a wide array of systems, including detailed procedures for engine mechanical work, fuel and ignition systems, transmission, drivetrain, brakes, suspension, and the electrical system. The manual includes guidance on basic maintenance, troubleshooting common issues, performing major repairs, and performing electrical diagnostics. With detailed torque specifications, wiring diagrams, and diagnostic flowcharts, this resource is invaluable for DIY motorcycle mechanics, BMW enthusiasts, and professional workshops seeking to preserve the performance and longevity of their Airhead boxers.