Uploaded December 2025 | Updated September 2026, 2 weeks ago

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Harley-Davidson debuted the Knucklehead in 1936 and millions of subsequent Big Twins built in its image continue to "potato-potato" down the road! Technical Editor Kevin Cameron and Editor-in-Chief Mark Hoyer talk about the origins of Harley-Davidson's EL and journey through the Panhead, Shovelhead, and up to the modern era. Think of it as the engine that grew with the American highway system! Join us on the ride!

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