This comprehensive workshop service repair manual provides detailed instructions and technical information for maintaining and repairing your Harley Davidson Knucklehead motorcycle, covering models from 1940 to 1947. The manual offers step-by-step procedures, accompanied by clear illustrations, diagrams, and wiring schematics, to guide you through every aspect of your motorcycle's repair. It includes in-depth explanations of each component and system, making it a valuable resource for both novice and experienced mechanics. The manual covers a wide range of topics, including general information, engine mechanical and electrical systems, emission control, fuel system, suspension, clutch, transmission, driveshaft, steering, brake system, body interior and exterior, and body electrical system. With its detailed substeps, notes, cautions, and warnings, this manual ensures you have the necessary information to perform repairs confidently and correctly. Its numbered instructions and bold figure numbers help you easily follow the repair procedures, while its well-organized table of contents allows for quick access to the information you need.

The Harley-Davidson Knucklehead, a legendary motorcycle produced from 1936 to 1947, stands as a testament to American ingenuity and engineering prowess. Its distinctive "knuckle" rocker arms, which protruded prominently from the engine cases, gave the motorcycle its iconic name. The Knucklehead, a groundbreaking design for its time, introduced several key innovations, including a fully enclosed valvetrain, a top-mounted camshaft, and a fully pressurized lubrication system, significantly enhancing performance and reliability. This robust engine, a 45-cubic-inch (740 cc) V-twin, boasted a powerful, smooth, and efficient performance, earning the Knucklehead a reputation for being a tough and dependable machine. The Harley-Davidson Knucklehead, available in various configurations, was embraced by riders across the country, from everyday commuters to adventurous riders traversing challenging landscapes. It became a symbol of freedom and American spirit, leaving an indelible mark on motorcycle culture. Its influence extended beyond the United States, capturing the hearts and minds of enthusiasts globally. Today, the Knucklehead remains a cherished icon, highly sought after by collectors and enthusiasts alike. As a testament to its enduring popularity, numerous clubs and organizations dedicated to the Knucklehead continue to thrive. Owning a Knucklehead is more than just possessing a motorcycle; it's an entry into a vibrant community of passionate individuals who share a love for this timeless classic. The 1940-1947 Workshop Service Repair Manual serves as an invaluable guide for those seeking to maintain, restore, and appreciate the remarkable legacy of the Harley-Davidson Knucklehead.