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   What is a knucklehead engine?

   • 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-cylinder, 45 degree, pushrod actuated overhead valve V-twin engine with two valves per cylinder.

   Harley-Davidson Knucklehead engine - Wikipedia

   en.wikipedia.org/wiki/Harley-Davidson_Knucklehead_engine

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   What is a Harley Davidson knucklehead engine?

   • The Harley-Davidson Knucklehead engine replaced the cheaper and simpler flathead engines, offering more power and better performance. The Knucklehead engine was ahead of its time in design and technology, featuring innovations such as a dry sump, mechanical oil pump, and better air and fuel flow.

   The Harley-Davidson Knucklehead Engine: An American V-Twin Icon - H…

   www.hotcars.com/harley-davidson-knucklehead-engine-facts/

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   How much is a knucklehead engine worth?

   • 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.

   The Harley-Davidson Knucklehead Engine: An American V-Twin Icon - H…

   www.hotcars.com/harley-davidson-knucklehead-engine-facts/

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   How long did the knucklehead engine last?

   • While it only lasted from 1936 to 1947, the Knucklehead engine layout has stuck around. It's easy to see glimpses of this classic mill in the modern twin engines of today, and it adds to the sheer excellence of the Harley-Davidson V-twin.

   The Harley-Davidson Knucklehead Engine: An American V-Twin Icon - H…

   www.hotcars.com/harley-davidson-knucklehead-engine-facts/

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   How many horsepower does a knucklehead have?

   • In 1936, Harley-Davidson introduced its first overhead-valve V-Twin motorcycle. The "Knucklehead" moniker came much later, although it stuck. With 37 horsepower, a full ten more than the Flathead predecessor, the Model E also had a sportier and higher-powered version, the EL Sport, that made a thrilling 40 hp.

   The Harley-Davidson Knucklehead Engine: An American V-Twin Icon - H…

   www.hotcars.com/harley-davidson-knucklehead-engine-facts/

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   What is a Knucklehead motorcycle?

   • The Knucklehead, introduced in 1936, was a transformative design that established Harley as a major influence in the motorcycle industry. Its innovative overhead valve design and distinctive knuckle-shaped rocker boxes set a new standard for power and reliability.

   Shovelhead Vs Knucklehead [Ultimate Comparison] - Two Wheller

   www.twowheller.com/shovelhead-vs-knucklehead/

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2. en.wikipedia.org › wiki › Harley-DavidsonHarley-Davidson Knucklehead engine - Wikipedia

   en.wikipedia.org › wiki › Harley-Davidson

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   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, replacing the Flathead-engined VL model in 1936 as HD's top-of-the-line model.

3. www.topspeed.com › the-harley-davidson-knuckleheadThe Harley-Davidson Knucklehead Engine: Everything You Need ...

   www.topspeed.com › the-harley-davidson-knucklehead

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   Aug 25, 2023 · The Knucklehead engine pioneered the engine layout that exists to this day in the modern Harley-Davidson Milwaukee 8 engine. Related: Win a 1937 Harley Davidson Knucklehead With Wheels...

   • Occupation: Motorcycle Writer

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5. motorcyclehorizon.com › what-is-a-knuckleheadWhat makes the Knucklehead motorcycle engine a timeless ...

   motorcyclehorizon.com › what-is-a-knucklehead

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   Jun 27, 2024 · The knucklehead engine earned its name from its distinctive rocker box shape that resembles a clenched fist, hence the term “knucklehead.” Introduced by Harley-Davidson in 1936, this revolutionary powerplant marked a leap forward in motorcycle technology.

6. www.hotcars.com › harley-davidson-knuckleheadThe Harley-Davidson Knucklehead Engine: An American ... - HotCars

   www.hotcars.com › harley-davidson-knucklehead

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   Dec 13, 2023 · The Harley-Davidson Knucklehead engine replaced the cheaper and simpler flathead engines, offering more power and better performance. The Knucklehead engine was ahead of its time in design and technology, featuring innovations such as a dry sump, mechanical oil pump, and better air and fuel flow.

7. Videos

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     1936 Harley-Davidson Knucklehead - Jay Leno's Garage

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     A Rare '37 Knucklehead Engine

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     Harley-Davidson 1936 Knucklehead internals in motion...

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8. bigbikereviews.com › harley-knuckleheadHarley Davidson Knucklehead Engine Review - Big Bike Reviews

   bigbikereviews.com › harley-knucklehead

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   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.

9. www.motorcyclespecs.co.za › Techinicale › HDHD Knucklehead - Motorcycle Specifications

   www.motorcyclespecs.co.za › Techinicale › HD

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   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 cylinder, 45 degree, pushrod actuated overhead valve V-twin engine with two valves per cylinder.

10. www.twowheller.com › shovelhead-vs-knuckleheadShovelhead Vs Knucklehead [Ultimate Comparison] - Two Wheller

    www.twowheller.com › shovelhead-vs-knucklehead

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    The Shovelhead and the Knucklehead are both iconic engines produced by the American motorcycle manufacturer Harley-Davidson. The first of the two to hit the market was the Knucklehead, introduced in 1936.