The BMW R90, produced in 1981, represents a significant offering in the realm of motorcycles, known for its robust engineering and enduring design. This model, powered by an air-cooled, horizontally opposed twin-cylinder boxer engine with a displacement of 897 cc, delivers approximately 60 horsepower and 56 lb-ft of torque, making it a capable machine for touring and general riding. Its heritage is rooted in BMW's long-standing tradition of producing high-quality, reliable motorcycles, with the R90 series being a key part of their boxer lineage. The R90 was manufactured in Berlin-Spandau, Germany, adhering to the stringent quality standards expected of the brand.

This comprehensive Full Service Repair Manual provides detailed guidance for the BMW R90 (1981 Model Year) and all its engine variants. It covers essential maintenance procedures, including oil changes, valve adjustments, and carburetor tuning, alongside in-depth repair instructions for engine overhauls, transmission servicing, and brake system maintenance. The manual also includes extensive electrical system coverage with wiring diagrams and troubleshooting guides, as well as information on chassis, suspension, and bodywork. This resource is designed to assist owners, mechanics, and technicians in maintaining, diagnosing, and repairing the R90, ensuring its optimal performance and longevity.