This comprehensive Harley Davidson Knucklehead Service Repair Manual provides a wealth of information for maintaining, servicing, diagnosing, and repairing your motorcycle. Containing the same information utilized by technicians at authorized dealerships, this manual serves as your go-to resource for any repair need. Dive into detailed instructions and diagrams covering all aspects of your Harley Davidson Knucklehead, ensuring you have the knowledge and guidance necessary for successful repair endeavors. Explore topics such as general information, fuel system, cooling system, engine top end, clutch, engine lubrication system, engine removal and installation, crankshaft and transmission, wheels and tires, final drive, brakes, suspension, steering, frame, electrical system, and an appendix for further reference. This manual empowers you to tackle any repair with confidence and precision.

The Harley Davidson Knucklehead, a motorcycle produced from 1936 to 1948, represents a significant milestone in motorcycle history. This iconic machine, named for its distinctive, exposed rocker arm "knuckles" atop the cylinder heads, revolutionized motorcycle design and performance. The Knucklehead engine, a 45-cubic inch (740 cc) V-twin, was a substantial departure from previous Harley Davidson models. It featured a new overhead valve design, a departure from the side-valve engines that were common at the time, delivering increased power and reliability. Other notable features included a redesigned frame, a telescopic front fork, and a rear swingarm, all contributing to a more comfortable and controlled ride. The Knucklehead quickly gained popularity for its smooth power delivery, its ability to reach higher speeds, and its durability, solidifying its place as a high-performance motorcycle.

However, the Knucklehead was not without its challenges. The engine, while innovative, required meticulous maintenance and adjustments, often leading to a reputation for being mechanically demanding. The early Knuckleheads, particularly those produced in the late 1930s, were prone to oil leaks and other issues. These issues were gradually addressed over the years with the introduction of improvements like a redesigned oil pump and improved seals. Despite these challenges, the Knucklehead remains an iconic motorcycle, revered for its sleek design, powerful engine, and historical significance. Enthusiasts today continue to appreciate the Knucklehead for its unique character and its place in motorcycle history, and the Harley Davidson Knucklehead Service Repair Manual is an invaluable tool for owners seeking to maintain and restore these vintage machines.