The Yamaha XJ550RH Seca, produced around 1981, is a mid-size naked sport-touring motorcycle characterized by its DOHC inline-four cylinder engine. With a displacement of 540 cc, it delivers approximately 53 horsepower and 30 lb-ft of torque, paired with a 6-speed manual transmission and chain drive. This model represents Yamaha's engineering prowess in the early 1980s, offering a blend of smooth power delivery and comfortable ergonomics suitable for both spirited riding and touring. Its design and performance placed it competitively within its segment, rivaling other Japanese manufacturers of the era. This comprehensive workshop service repair manual, written in English, provides detailed information for the Yamaha XJ550RH Seca. It covers all essential aspects of the vehicle, from routine maintenance procedures such as oil changes and spark plug checks to in-depth repair instructions for engine overhauls, carburetor rebuilding, and suspension servicing. The manual also includes vital troubleshooting guides, electrical system diagnostics, and technical specifications, making it an indispensable resource for owners, mechanics, and technicians seeking to maintain, repair, and optimize the performance and longevity of this classic motorcycle.