This manual covers AJS motorcycles from 1958, a period when AJS was a respected British manufacturer known for its performance and reliability. Associated with the Associated Motorcycles group, AJS bikes competed with other prominent marques of the era. This workshop service and repair manual provides essential technical information for maintaining and repairing these classic machines, making it a valuable resource for collectors and restorers. The manual details various common AJS engine configurations from 1958, including single-cylinder 350cc and 500cc models, as well as parallel-twin 350cc and 500cc variants.

This comprehensive workshop manual is designed for in-depth mechanical work, diagnostics, and routine maintenance. It offers full service and repair instructions for AJS 1958 models, covering a wide range of systems including the engine, transmission, brakes, suspension, electrical components, and chassis. The manual details procedures for engine overhauls, tuning, carburetor adjustments, ignition system service, lubrication, and cooling systems. Additionally, it provides step-by-step instructions for gearbox and clutch operations, brake system servicing, suspension maintenance, and electrical system diagnostics. Owners and technicians will find detailed guidance on routine maintenance tasks, troubleshooting common issues, and performing necessary adjustments to keep these vintage motorcycles in optimal condition.