This comprehensive Harley Davidson Knucklehead Service and Repair Manual covers models from 1940 to 1947, offering a wealth of technical information for enthusiasts and mechanics alike. It delves into the intricacies of these iconic motorcycles, providing detailed instructions on maintenance, repair, and troubleshooting. The manual contains a wealth of information, including mechanical and technical specifications, an introduction to mechanics, equipment elevation, collision repair, product and supply information, painting techniques, and a comprehensive description of all vehicle components. With step-by-step instructions, illustrations, and diagrams, this manual equips you with the knowledge to handle various tasks from basic maintenance to complex repairs. Whether you're a seasoned mechanic or a dedicated owner, this manual is an invaluable resource for understanding the inner workings of your Harley Davidson Knucklehead.

The Harley-Davidson Knucklehead, produced from 1936 to 1947, was a revolutionary motorcycle that cemented Harley-Davidson's position as a leading manufacturer of high-performance motorcycles. The Knucklehead, named for its distinctive "knuckle" shaped rocker arms, introduced several groundbreaking features that became industry standards. Its overhead valve (OHV) engine, a departure from the previous flathead design, offered significant performance improvements, delivering increased power and smoother operation. The Knucklehead's distinctive design, featuring a teardrop fuel tank and a streamlined, aerodynamic profile, became iconic in the motorcycle world. Its robust construction and reliable performance made it a favorite among both casual riders and competitive racers. The Knucklehead was a popular choice for riders during the pre-war era, and its production continued throughout World War II. The war effort, however, did impact production, resulting in a simplification of the design and the use of less polished materials. Despite these wartime changes, the Knucklehead continued to be a popular and highly sought-after motorcycle. Post-war, the Knucklehead saw further evolution, with the introduction of the "Panhead" engine in 1948, which featured a redesigned rocker box that eliminated the "knuckle" shape. Despite the arrival of the Panhead, the Knucklehead remains a beloved classic and is highly sought after by collectors and enthusiasts today. The Knucklehead's legacy extends beyond its iconic status; it is credited with pioneering several innovations that laid the groundwork for the future of motorcycle design and performance.