In the early days of motorcycling, one man set out to build the perfect machine—and nearly did.

This episode tells the story of William G. Henderson and the legendary Ace motorcycle: a groundbreaking inline-four that redefined speed, refinement, and engineering ambition in 1920s America. From record-breaking rides to financial collapse, it’s a tale of brilliance, risk, and a vision that lived on long after its creator was gone.

A story of innovation, tragedy… and a machine that was simply ahead of its time.