Engineering:Harley-Davidson Ironhead engine

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Harley-Davidson Ironhead Sportster engine at the Harley-Davidson Museum
1980 HD XLR Sportster with Ironhead Engine
1957 Harley-Davidson XL Sportster with Ironhead Engine
ManufacturerHarley-Davidson
Also calledXL
Production1957 to 1985
PredecessorHarley-Davidson KHK

The ironhead was a Harley-Davidson motorcycle engine, so named because of the composition of the cylinder heads (Iron instead of Aluminium).[1] The engine is a two-cylinder, two valves per cylinder, pushrod V-twin. It was produced from 1957 until 1985 [2] and was replaced by the Evolution engine in 1986.[3]

This name was applied to the Harley-Davidson Sportster motorcycles that used this engine.

See also

References

  1. ↑ Owen, Justin (2024-09-18). "Every Harley-Davidson Engine Ever Built" (in en-US). https://www.slashgear.com/1665545/harley-davidson-engines-history/. 
  2. ↑ "Ironhead Archive" (in en). https://www.thunderbike.com/engine/ironhead-en/. 
  3. ↑ Patrascu, Daniel (2023-09-02). "Harley-Davidson Engines: Full Timeline and History (1903-2024)" (in en). https://www.autoevolution.com/news/harley-davidson-engines-full-timeline-and-history-220449.html. 



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