1913 Cyclone Board Track Racer
From its debut in 1913 to its demise in 1915, the Cyclone board track racer was, perhaps, the most technologically advanced motorcycle of its day. It's estimated that nearly 300 were built over three years of production, but just six are reported to survive today. In 2015, a 1915 Cyclone Board Track Racer previously owned by Steve McQueen was sold for US$852,000 at auction. It was the highest price paid for a motorcycle at auction at that time.