Harley-Davidson Ironhead engine

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.

See also

• Harley-Davidson engine timeline

External links

• Images of each style of Harley-Davidson engine

1. Harley-Davidson Evolution engine
2. Harley-Davidson Sportster
3. Harley-Davidson engine timeline
4. Ironhead
5. List of Harley-Davidson motorcycles
6. Harley-Davidson