The YX600 Radian, produced from 1986 to 1990, is a versatile sport-touring motorcycle renowned for its blend of performance and rider comfort. As a product of an established heritage of innovation and reliability, the YX600 Radian features a liquid-cooled, inline four-cylinder engine with a DOHC, 4-valve per cylinder configuration, delivering approximately 60-70 horsepower. Its robust steel frame is engineered for stability, complemented by hydraulic disc brakes at both the front and rear for effective stopping power. This model was designed to offer an engaging riding experience suitable for both spirited journeys and everyday commuting, embodying a commitment to quality engineering. This comprehensive Workshop Service Repair Manual, written in English, covers all styles of the YX600 Radian for the model years 1986 through 1990. It provides in-depth, professional-quality information essential for maintaining and repairing the vehicle, catering to both do-it-yourself enthusiasts and experienced mechanics. The manual details engine overhaul, electrical system diagnostics, fuel system tuning, cooling system management, transmission service, suspension adjustments, brake system maintenance, and chassis inspection. With hundreds of pages, including numerous photos and illustrations, it offers step-by-step instructions, troubleshooting guidance, and special tool requirements, making it an invaluable resource for ensuring the YX600 Radian remains in optimal working condition.