The Harley Davidson Knucklehead 1940-1947 Service Repair Manual is a comprehensive guide for servicing and repairing your classic motorcycle. This manual contains detailed instructions and illustrations for every aspect of your Knucklehead, from basic maintenance to complex engine rebuilds. The manual covers everything from general information about your Knucklehead to detailed instructions on servicing the engine, transmission, electrical system, brakes, suspension, and more. It includes step-by-step instructions for all procedures, along with detailed illustrations and photos to ensure you understand each step. The manual is organized for easy navigation, with a numbered table of contents that allows you to quickly find the information you need. It also features notes, cautions, and warnings throughout each chapter to help you avoid potential problems and ensure safe operation. Whether you're a seasoned mechanic or a do-it-yourself enthusiast, this manual is an invaluable resource for keeping your Harley Davidson Knucklehead running smoothly.

The Harley Davidson Knucklehead, produced from 1936 to 1947, marked a significant evolution in motorcycle design, introducing a revolutionary overhead valve engine that would define the company's legacy for decades. The "Knucklehead" moniker comes from the distinctive, exposed rocker arms and pushrods that resemble knuckles on the engine's cylinder heads. This distinctive feature became synonymous with Harley Davidson, signifying power and durability. These motorcycles were known for their smooth, powerful performance, making them ideal for both city riding and long-distance touring. They represented a shift toward a more refined and luxurious riding experience, appealing to both experienced riders and those new to the world of motorcycles. The 1940-1947 Knucklehead represents a period of refinement and further development of the original design. The engine was upgraded to a larger 74 cubic inch displacement, delivering more power and torque. The streamlining of the design included features like a teardrop fuel tank and integrated fender lights, enhancing both aesthetics and functionality. This model also incorporated a redesigned frame and suspension for improved handling and rider comfort. These improvements solidified the Knucklehead's reputation as a reliable and capable motorcycle, making it a favorite among riders and a sought-after collectible today. The service repair manual provides invaluable insight into the intricacies of these machines, guiding owners and enthusiasts through maintenance and repair procedures, ensuring these iconic motorcycles continue to run strong for generations to come.