What is ironheads?

Ironheads is a term commonly used to refer to Harley-Davidson motorcycles manufactured from 1957 to 1985 that had iron cylinder heads. These motorcycles were known for their distinctive V-twin engines and were popular among riders for their power and reliability. The Ironhead engine was known for having a reputation for being difficult to maintain and often required frequent adjustments to prevent overheating. These bikes are now considered classic and are sought after by collectors and enthusiasts alike.