The Triumph Thunderbird Sport 900, produced in 2001 and manufactured in Hinckley, England, represents a performance-oriented iteration of Triumph's cruiser lineage. This motorcycle is powered by a liquid-cooled, DOHC, inline three-cylinder engine with an 885cc displacement, producing approximately 96 hp and 72 lb-ft of torque. It features a 5-speed manual transmission, hydraulic disc brakes front and rear, and is recognized for its characterful triple engine and solid handling. The Thunderbird Sport 900 is often praised by owners for its classic styling and performance, embodying the rich heritage of motorcycle history, which dates back to 1902. This comprehensive workshop service and repair manual provides in-depth, factory-quality coverage for the Triumph Thunderbird Sport 900 (T309RT). It is designed to assist both do-it-yourself enthusiasts and professional mechanics in maintaining and repairing the motorcycle. The manual covers all essential areas, including detailed engine disassembly and repair, electrical system troubleshooting with wiring diagrams, chassis and bodywork procedures, and routine maintenance. It also offers step-by-step instructions for diagnostics, adjustments, and component replacement, ensuring the vehicle remains in optimal condition. The digital format allows for easy navigation, printing, and searching of information.