The BMW R90, produced during the 1973-1976 period, represents a significant achievement in motorcycle engineering from Bayerische Motoren Werke AG. This air-cooled, boxer-twin motorcycle, with its robust steel tube frame and shaft drive, was celebrated for its performance, handling, and build quality, making it a popular choice for touring and sport riding. The R90 Series, including the R90/6 and the sportier R90S variant, built upon BMW's long heritage in motorcycle manufacturing, offering refinement and power that earned high owner satisfaction and consistent praise in contemporary reviews.

This comprehensive service and repair manual provides detailed guidance for the complete maintenance and repair of the BMW R90 Series. It covers all essential systems, including the engine, transmission, drivetrain, suspension, brakes, and electrical system, offering step-by-step instructions for preventative maintenance, troubleshooting, and component rebuilds. With over 300 pages of technical data, diagnostic flowcharts, and essential specifications, this manual is an indispensable resource for BMW motorcycle enthusiasts, DIY mechanics, and service technicians aiming to maintain their R90 with confidence and precision.