The BMW R90, produced between 1973 and 1976, represents a significant era for BMW Motorrad, a brand with a heritage dating back to 1916. This model, particularly the R90/6, was engineered as a premium sport-touring motorcycle, celebrated for its robust build quality, reliable air-cooled boxer twin engine, and comfortable ergonomics. Key features include a shaft drive, smooth power delivery from its 897.2 cc engine, and stable handling, which contributed to BMW's strong reputation for engineering excellence and long-distance touring capabilities.

This comprehensive factory service manual provides detailed information for the complete service, repair, and maintenance of the BMW R90. It covers all essential systems, including the R90/6 Boxer Twin engine, fuel system, 5-speed gearbox, electrical components, chassis, suspension, and braking systems. The manual includes step-by-step repair procedures, preventative maintenance schedules, troubleshooting guides, and technical specifications, empowering owners and technicians to maintain the vehicle's performance and longevity.