Harley-Davidson Ironhead engine
Manufacturer | Harley-Davidson |
---|---|
Also called | XL |
Production | 1957 to 1985 |
Predecessor | Harley-Davidson KHK |
The ironhead was a Harley-Davidson motorcycle engine, so named because of the composition of the cylinder heads (Iron instead of Aluminium). The engine is a two-cylinder, two valves per cylinder, pushrod V-twin. It was produced from 1957 until 1985 and was replaced by the Evolution engine in 1986.
This name was applied to the Harley-Davidson Sportster motorcycles that used this engine.