This manual covers the Tiger 100 T100S, a classic British motorcycle produced from 1963 to 1974. Renowned for its parallel-twin engine and iconic styling, motorcycles of this era are celebrated for their engineering quality and enduring appeal. The Tiger 100 T100S, often representing a performance-oriented variant, embodies the heritage of producing reliable and engaging machines. This comprehensive guide is designed for owners and enthusiasts seeking to maintain and preserve these historically significant motorcycles. This Factory Service Repair Manual provides detailed, step-by-step instructions for all aspects of the Tiger 100 T100S. It covers general information, engine disassembly and assembly, fuel and cooling systems, clutch and transmission, wheels, brakes, suspension, steering, frame, and the electrical system. The manual includes troubleshooting procedures, maintenance schedules, tune-up guidelines, and rebuild instructions, all supported by hundreds of photos and illustrations. Its thorough content makes it an indispensable resource for anyone undertaking service, repair, or restoration of this classic model.