|Board track racers hit 100+ wearing leather helmets and wool jerseys. In crashes, they were sometimes killed by splinters.|
Board track racing was very popular and an important way for Indian to promote sales. In order to make a more powerful motor, Hedstrom knew he needed to incorporate overhead valves. The problem was they were more prone to breakage, causing catastrophic engine damage. As early as 1911 he solved this problem by using four valves per cylinder instead of two, thus making each valve lighter and easier to open and close. The result was a motor capable of propelling the flimsy board track racers of the day, which were unencumbered by brakes of any kind, to nearly 120 miles an hour!