This comprehensive service and repair manual provides detailed instructions and specifications for maintaining and repairing your BMW R90 motorcycle, covering all model years from 1978 to 1996. It covers a wide range of topics, including engine, transmission, electrical system, suspension, brakes, and bodywork. The manual is organized in a logical and easy-to-follow manner, with clear illustrations and diagrams to guide you through each repair procedure. Whether you are a seasoned mechanic or a novice DIY enthusiast, this manual will equip you with the necessary information to keep your BMW R90 running smoothly for years to come. It includes detailed information on troubleshooting common problems, performing routine maintenance tasks, and undertaking complex repairs.

## The BMW R90: A Classic Air-Cooled Icon

The BMW R90, produced from 1978 to 1996, is a quintessential example of the classic Bavarian motorcycle. This air-cooled, boxer-twin engine machine embodied the timeless appeal of BMW motorcycles, renowned for their reliability, durability, and comfortable riding experience. The R90 marked a departure from its predecessor, the R90S, with a more relaxed riding posture facilitated by higher handlebars and a revised seat. Although the engine remained largely the same, with its 898cc displacement and air-cooled, horizontally opposed twin cylinders, the R90 was equipped with a newly designed fuel tank, creating a more streamlined aesthetic than its sporty sibling.

The R90 was available in various trims throughout its production run, offering a range of options for riders. From the standard R90, which provided a balanced blend of performance and comfort, to the R90S, which was more focused on sport riding with its low-slung handlebars and racier styling, the R90 lineup catered to diverse rider preferences. It wasn't just about aesthetics, however. The R90's shaft drive system, a hallmark of BMW motorcycles, contributed to its smooth and predictable power delivery, while the Telelever front suspension, another notable BMW innovation, offered superior handling and a plush ride quality. Beyond its technical prowess, the R90 was praised for its timeless design, with its classic lines and iconic boxer engine capturing the imaginations of riders across the globe. The BMW R90 firmly established itself as a cornerstone of BMW's success, forging a legacy that continues to inspire motorcycle enthusiasts today.