This manual covers the BMW R90 motorcycle, a model renowned for its robust engineering and enduring legacy in the world of motorcycling. Produced primarily in the mid-1970s, the R90 series, including variants like the R90/6 and the sportier R90S, is celebrated for its air-cooled, four-stroke boxer twin engine, offering a blend of smooth power delivery and reliable performance. BMW's commitment to quality is evident in the durable construction and the distinctive shaft drive system, making these motorcycles highly sought after by enthusiasts and collectors alike. The R90 represents a significant chapter in BMW's motorcycling history, embodying the brand's dedication to innovation and rider satisfaction.

The purpose of this comprehensive service and repair manual is to provide detailed guidance for the maintenance, troubleshooting, and repair of the BMW R90. It is meticulously prepared to assist both professional technicians and experienced DIY mechanics in understanding and working on the various systems of the motorcycle, including the engine, fuel system, transmission, brakes, suspension, and electrical components. The manual offers step-by-step procedures, diagnostic information, technical specifications, and torque values, ensuring that all work performed adheres to factory standards. With its clear, actionable instructions and detailed diagrams, this manual is an indispensable resource for preserving the performance and longevity of your BMW R90.