This comprehensive repair manual covers all aspects of maintaining and repairing your Harley Davidson Knucklehead motorcycle, manufactured between 1940 and 1947. It's designed to be a valuable resource for both professional technicians and do-it-yourself mechanics. The manual provides detailed instructions and illustrations for a wide range of procedures, including: * **Step-by-step repair procedures:** The manual guides you through the process of repairing various components of your Knucklehead, ensuring you understand each step and can perform the work accurately. * **Critical specifications:** You'll find essential specifications and measurements for crucial components, allowing you to ensure proper fit and function during repairs. * **Visual guidance:** Detailed illustrations and diagrams accompany the repair instructions, providing a clear visual representation of each step, making the process easier to follow and understand. * **Maintenance procedures:** The manual includes instructions for routine maintenance procedures, helping you keep your Knucklehead running smoothly and extending its lifespan. * **Disassembly and assembly procedures:** Learn the proper techniques for disassembling and reassembling various parts, ensuring everything is put back together correctly, minimizing the risk of damage. * **Cleaning and reinstalling procedures:** The manual covers the correct methods for cleaning and reinstalling components, ensuring they are properly lubricated and functioning correctly after repair. This manual is your go-to reference for keeping your Harley Davidson Knucklehead in top condition. Whether you're a seasoned mechanic or just starting out, this resource provides the knowledge and guidance you need to confidently maintain and repair your classic motorcycle.

The Harley-Davidson Knucklehead, produced from 1936 to 1947, is a legendary motorcycle that truly embodied the spirit of American motorcycling in the pre-war era. Its distinctive engine, known as the "Knucklehead" for its distinctive exposed rocker arm covers that resembled knuckles, was a technological marvel for its time. This air-cooled, 45-cubic-inch V-twin engine boasted a single overhead camshaft and offered impressive power and reliability. The Knucklehead's design featured a rigid frame with a springer front fork, providing a unique and comfortable ride for the time. It was built with a focus on durability, featuring a cast-iron cylinder and head, and a robust transmission that could handle the inherent power of the engine. The Knucklehead was available in various styles, ranging from the iconic "bobber" to touring models, catering to a wide range of riders. The Knucklehead's legacy goes beyond its technical innovations. It became a symbol of freedom, adventure, and individuality, and quickly gained a reputation for its performance and rugged reliability. Riders from all walks of life embraced the Knucklehead, using it for everything from daily commuting to long-distance touring and thrilling racing. Its iconic design and powerful engine have made it a highly sought-after collectible by motorcycle enthusiasts worldwide. The Knucklehead stands as a testament to Harley-Davidson's commitment to quality engineering and its enduring place in motorcycling history. Today, these vintage motorcycles continue to inspire and captivate, representing an era of unbridled freedom and classic American design.