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. [1] The engine is a two-cylinder, 45 degree, pushrod actuated overhead valve V-twin engine with two valves per cylinder. Classic / Vintage (2) Harley-Davidson Knucklehead Motorcycles For Sale: 31 Motorcycles Near Me - Find New and Used Harley-Davidson Knucklehead Motorcycles on Cycle Trader.
Thunderbike Knucklehead 1945 • Custombike & HarleyDavidson Gallery
The 61 cubic-inch E, ES and EL Harley-Davidson models ushered in the transition from the long-serving but under-powered side-valve flathead V-twin engine to the higher tech and higher powered. Published Aug 25, 2023 The Knucklehead was one of the first modern motorcycle engines ever produced, and provided a foundation for Harley-Davidson to build upon Mecum Harley-Davidson Knucklehead Article by Vintage Vinny 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 "Knucklehead" wouldn't come about until years later. by Sedrick Mitchell 1936 Harley-Davidson EL 1936 Harley-Davidson EL Top speed: 95mph Engine: 60.33ci (988.56cc) air-cooled OHV 45-degree V-twin, 3-5/16in x 3-1/2in bore and stroke, 7:1 compression ratio, 40hp @ 4,800rpm Weight (wet): 515lb (234kg) Fuel capacity/MPG: 3.75gal (14ltr)/35-50mpg Published on Oct 8, 2015 Need Help? Call 1-800-880-7567
1947 HarleyDavidson Knucklehead S106 Las Vegas Motorcycle 2017
The Knucklehead engine models, such as the EL and FL, are considered iconic and highly valued by classic motorcycle enthusiasts, with prices ranging from $80,000 to over $125,000. A far cry from today's Milwaukee-Eight engines, the iconic Harley-Davidson Knucklehead engine debuted as a V-twin, overhead-valve engine in 1936. Lifestyle Harley-Davidson Knucklehead V-Twin Motorcycles - HISTORY OF THE BIG TWIN The H-D Knucklehead V-twin was introduced in 1936. Here's a look at the technical evolution of the 61-cu.-in.. Now nicknamed the "Knucklehead" for its bulbous rocker boxes, surprisingly the new Harley-Davidson big twin was developed in Depression era America. The frame, forks, engine and much of the styling were all new. The Knucklehead is a bike that bends the norms in a market that is underappreciated by younger buyers. However, the motorcycle market doesn't act like the car market. Although 1940s cars aren't blossoming, 1940s American bikes have strong appeal to a surprisingly youthful audience, making them sound investments.
HarleyDavidson Knuckleheads rock the collectible motorcycle auction marketplace in Las Vegas
Benjamin Smith | Updated on December 11, 2021 Have you ever heard of the Harley-Davidson Knucklehead? If you are a motorcycle aficionado, there is absolutely no doubt that you know exactly what it is. As a matter of fact, you might have not only heard of it, but perhaps you even own one yourself. The 1936 Knucklehead: Ahead of its Time. 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.
Follow the journey of this 1941 Harley-Davidson Knucklehead motorcycle and see how its latest owner finished a restoration project that began in the 1980s. 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. Detailed engineers drawing of a 1942 Knucklehead Engine. Pic: Daniel Hagerman
1947 HarleyDavidson Knucklehead FL S56 Las Vegas Motorcycle 2018
The Harley Davidson Knucklehead is a retronym referring to an engine blueprint produced by the American OEM from 1936 to 1947. This power mill had a piston displacement of 997—1,210 cm3 (61—74 ci), spewed 36—53 hp (26.8—39.5 kW), and was the forerunner of the Panhead and Shovelhead engines. The Knucklehead engine may have been rushed. (Museum object #2003.19.1) The FL was Harley-Davidson's first modern "heavyweight" motorcycle. Introduced in 1941, the FL featured the high compression version of the company's first 74-cubic-inch overhead valve V-Twin "Knucklehead" engine.
