This manual serves as a comprehensive guide for AJS and Matchless motorcycles produced between 1957 and 1966. Renowned British manufacturers, AJS and Matchless produced a range of lightweight and heavyweight models during this era, including the 250 c.c. and 350 c.c. G2, G2S, G2CS, G2CSR, 14, 14S, 14CS, 14CSR, G5, and 8 models, as well as the 350 c.c., 500 c.c., and 600 c.c. G3, G3C, G3S, G3LS, G3LCS, G80, G80S, G80CS, TCS, 16, 16S, 16C, 16CS, 16MS, 16MC, 16MCS, 18, 18S, and 18CS models. This period saw significant evolution in motorcycle engineering, and this manual provides the detailed information necessary to understand and maintain these classic machines. The 1957-1966 Service Repair Workshop Manual is an essential resource for owners and mechanics alike. It covers all major systems, including engine design, lubrication, drivetrain, suspension, brakes, and the electrical systems from Wipac and Lucas, featuring detailed wiring diagrams. The manual provides step-by-step repair instructions, periodical maintenance schedules, fluid specifications and capacities, and troubleshooting guidance for common issues. Its comprehensive nature, from basic servicing to complete overhauls, ensures that users can effectively maintain and repair their motorcycles, preserving their performance and longevity.