The engine is a two-cylinder, 45 degree, pushrod actuated overhead valve V-twin engine with two valves per cylinder. It was the third basic type of V-Twin engine used by Harley-Davidson, …

Aug 25, 2024 · The KN-Series engines are very close in appearance to a stock knucklehead engine, but offer a number of modern features for more power, better engine life, and …

Jan 13, 2025 · It only took Harley-Davidson 33 years to come up with its first overhead-valve V-twin engine, which it nicknamed the Knucklehead, thanks to the engine's distinctive rocker …

Aug 25, 2023 · The Second World War started in 1939 and direct U.S. involvement commenced in late 1941, which gave Harley-Davidson engineers time to continue development of the …

Feb 1, 2025 · The Knucklehead engine, introduced by Harley-Davidson in 1936, is one of the most iconic milestones in motorcycle history. Officially known as the EL engine, it earned its …

New and used Harley Davidson Knucklehead engines for sale by individuals, parts suppliers, and dealers. Officially called the EL series when it was introduced, this V-twin engine got its …

Jun 27, 2024 · Introduced by Harley-Davidson in 1936, this revolutionary powerplant marked a leap forward in motorcycle technology. Revolutionizing the motorcycle industry, the …

The knucklehead is a retronym used by enthusiasts to refer to a Harley-Davidson motorcycle engine, so named because of the distinct shape of the rocker boxes. The engine is a two …

In 1936, Harley-Davidson introduced their first overhead-valve Big-Twin motorcycle, the 61 cubic-inch EL model. The new bike was originally known as the "61 Overhead". The nickname …

The Harley-Davidson Knucklehead isn’t just an engine—it’s the engine that set the standard for American V-twins. When it debuted in 1936, it didn’t just introduce overhead valves, improved …