The BMW R90/6, produced from 1973 to 1976, represents a significant achievement in the premium large-displacement touring and sport-touring motorcycle segment. Known for its robust build quality, reliable performance, and the distinctive engineering of its air-cooled, horizontally opposed twin-cylinder boxer engine, the R90/6 offered a blend of comfort and capability. Its shaft drive system and substantial 897 cc displacement contributed to its reputation as a capable touring machine, competing with other prominent motorcycles of its era. The model is celebrated for its durability and engineering excellence, a hallmark of BMW's storied motorcycle heritage.

This Workshop Service Manual (WSM) provides comprehensive service and repair information for the BMW R90/6 motorcycles manufactured between 1973 and 1976. It covers all essential systems, including detailed procedures for engine overhaul, drivetrain maintenance, chassis repairs, and electrical system diagnostics. The manual includes routine maintenance schedules, troubleshooting guides for common issues, and specifications for special tools. Its purpose is to assist owners, mechanics, and technicians in maintaining, repairing, and optimizing the performance and longevity of the R90/6, ensuring its continued reliability and operational excellence.