This manual covers the BMW R90, a classic motorcycle renowned for its engineering quality and reliability, particularly its air-cooled, four-stroke boxer-twin engine. Produced by BMW Motorrad, a division with a rich heritage in motorcycle manufacturing, the R90 model represents a significant part of the brand's legacy, known for its distinctive engine design and suitability for long-distance touring. This 1986 manual provides comprehensive technical information for owners and technicians, detailing the robust construction and performance characteristics that have made BMW motorcycles highly regarded among enthusiasts.

The purpose of this English-language, digital service and repair manual is to provide detailed guidance for the maintenance, troubleshooting, and repair of the BMW R90. It covers all major systems, including the engine mechanicals, fuel and ignition systems, transmission, brakes, suspension, and electrical components. With over 300 pages of in-depth information, including routine maintenance procedures, component replacement instructions, and complete rebuild procedures for key systems, this manual serves as an essential resource for owners and independent repair shops. It aims to empower users to effectively maintain their vehicle, ensuring its longevity and optimal performance.