The Yamaha XJ550RH Seca, produced around 1981, represents a notable entry in the sportbike and sport-touring segment of its era. This model, part of Yamaha's XJ series, was engineered to offer a blend of performance and comfort, distinguished by its compact and potent four-cylinder inline engine and a sportier aesthetic featuring a bikini fairing. With a 552 cc displacement and an estimated 53 horsepower, it provided capable performance for its class, competing with models from Honda, Kawasaki, and Suzuki. Its design philosophy focused on smooth power delivery and reliability, characteristic of Yamaha's commitment to quality engineering. This comprehensive Factory Service Repair Manual in English provides detailed guidance for the complete maintenance and repair of the Yamaha XJ550RH Seca. It covers all essential systems, including the engine, fuel system, ignition, drivetrain, electrical components, suspension, brakes, wheels, and bodywork. The manual details routine maintenance procedures, troubleshooting common issues, and major repair overhauls, offering in-depth technical specifications and diagnostic steps. This resource is designed to assist owners, mechanics, and technicians in effectively maintaining, troubleshooting, and repairing the vehicle, ensuring its optimal performance and longevity.