The BMW R90, produced around the early to mid-1970s, stands as a testament to BMW's enduring legacy in crafting robust and reliable motorcycles. Known for its distinctive air-cooled, horizontally opposed twin-cylinder boxer engine and shaft drive system, the R90 series offered a compelling blend of touring comfort and sporting capability. Its engineering quality, characterized by durable construction and a focus on rider experience, cemented its reputation as a dependable machine that appealed to riders seeking both performance and longevity. The R90's design emphasized mechanical integrity and a classic aesthetic, making it a sought-after model for enthusiasts.

This comprehensive service and repair manual provides detailed guidance for all aspects of the BMW R90. It covers essential maintenance procedures, including scheduled servicing, fluid changes, and component adjustments, alongside in-depth troubleshooting and overhaul instructions for all major systems such as the engine, transmission, brakes, and electrical components. Technical specifications, torque values, and information on special tools are also included. This manual is an indispensable resource for owners, mechanics, and technicians aiming to maintain, repair, and preserve the performance and value of their BMW R90 motorcycle.