How Harley-Davidson Knucklehead Redefined the American V-Twin Sound
In 1936, Harley-Davidson staked its future on an engine that no one asked for. The country was still coming out of the worst motorcycle sales recession in American history, and the company’s big twins were still running on decades-old flathead technology. At that uncertain moment, Harley introduced the 61 OHV, complete with a new frame,