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Mar 15, 2024 · The Knucklehead, officially known as the 1936 E/ES/EL, was the first Harley-Davidson to feature overhead valves, whose valve covers resembled the knuckles on a closed fist (hence the name). In...
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- 45-degree V-Twin
- 74 cubic inches
- 40 HP
It was the third basic type of V-Twin engine used by Harley-Davidson, replacing the Flathead-engined VL model in 1936 as HD's top-of-the-line model. The engine was manufactured until 1947 and was replaced by the Panhead engine in 1948.
- The 1936 Knucklehead: Ahead of Its Time
- Harley, We Have A Problem
- Easing on Down The Road
- The Harley-Davidson Knucklehead: The King of The Road
In the 1930s, Harley-Davidson had already solidified itself as a reliable maker, and that was proven through its acquisition of government contracts to supply motorcycles to both the US Military and other US governmental agencies. Even still, sales lagged as Harley took a backseat to its competitor, Indian. Harley execs felt the path to resurgence ...
Harley’s need to surpass Indian overshadowed their sensibility, causing them to release just under 2,000 Knuckleheads even though it still suffered from technical difficulties. Problems that the ‘36 came with included: 1. Valve Springs that broke quickly. 1. Poorly lubricated rockers. 1. Significant oil leaks. This was due to the fact that the comp...
By ‘38, Harley had gotten the design flaws hammered out, but it continued to improve on the Knucklehead for almost a decade.Some of those changes included: 1. ‘38 - The engine’s top was covered entirely. 1. ‘39 - Stiffer valve springs were added. 1. ‘40 - A larger flywheel was included. 1. ‘41 - The new FL Model rolled out, introducing a larger 74 ...
Though its beginnings were rocky, almost 80 years after hitting the streets, the Knucklehead continues to be at the top of every Harley lover’s wishlist.Keeping true to the company’s original principle, “we do not sell motorbikes, but the unique experience of a lifestyle,” the Knucklehead allowed riders to experience the freedom of the open road in...
The 1936 61ci Knucklehead was the first Harley big twin to use an overhead-valve layout. This configuration means that the location for the inlet and exhaust valves is in the cylinder head. These are then actuated by pushrods mounted on the outside of the cylinders.
Overview of Iconic Harley-Davidson Engines. The Harley-Davidson engines—Knucklehead, Panhead, and Shovelhead—each represent a pivotal era in motorcycle engineering. Knucklehead: Released in 1936, the Knucklehead engine boasted a 61-cubic-inch displacement that later expanded to 74 cubic inches. Its name came from the unusual shape of its ...
Oct 8, 2015 · The iconic “Knucklehead” — the overhead valve 61-cubic-inch V-twin introduced by Harley-Davidson in early 1936 — is a milestone motorcycle and one of the most important American bikes ever made. Yet up until the last minute, it was uncertain whether Harley would release the bike for sale.
Dec 13, 2023 · From 1936 to 1938, Harley-Davidson introduced the Knucklehead in three versions: The E, the ES, for sidecar use, and the EL, the HiPo version of the E with 40 horsepower. By 1938, they dropped the E models, making them one of the rarest models and a vaunted classic today.
