This comprehensive BMW R90 1983 Full Service Repair Manual provides you with the essential information needed to expertly repair, maintain, rebuild, refurbish, or restore your classic motorcycle. The manual delves into every aspect of the R90, offering detailed instructions and diagrams for all systems, including the engine, transmission, electrical system, brakes, suspension, and more. It covers everything from routine maintenance procedures like oil changes and filter replacements to advanced repairs such as engine rebuilds and electrical troubleshooting. With clear, step-by-step instructions and detailed illustrations, this manual empowers you to tackle any repair or maintenance task with confidence. It is an indispensable tool for both novice and experienced mechanics, ensuring that your BMW R90 remains in optimal condition for years to come.

## The BMW R90: A Classic Air-Cooled Boxer The BMW R90, produced from 1976 to 1985, was a highly successful evolution of the legendary air-cooled boxer engine motorcycles that BMW had been refining since the 1920s. This particular model, the 1983 R90, represents a peak in the development of the R series, offering a blend of classic design, reliable performance, and practicality that continues to make it highly sought after by enthusiasts today. The R90 features a robust 898cc air-cooled boxer twin engine, renowned for its smooth power delivery and durability. It boasted a unique, distinctive design with a telescopic front fork, swingarm rear suspension, and a classic, functional, and minimalist aesthetic. The R90 was praised for its comfortable riding position, precise handling, and its forgiving nature, making it suitable for both long-distance touring and spirited backroad riding. The 1983 R90 model, in particular, benefited from improvements that addressed some of the previous generation's weaknesses. These included changes to the electrical system, introduction of an alternator, and the inclusion of a new "Monolever" rear suspension system for improved ride quality and handling. Although the R90 was initially positioned as a more economical option compared to the larger R100, it quickly gained a reputation for its versatility and reliability. It became a popular choice for a diverse range of riders, from experienced touring bikers to those seeking a classic, timeless motorcycle that offered a comfortable and rewarding ride. The R90 remains a popular choice for restoration projects, and many modified versions have emerged, showcasing the enduring appeal and customization potential of this iconic motorcycle.