On a cool Monday morning on Sept. 13, 1948, Rollie Free lifted from Harley Davidson the US national motorcycle speed record by riding the first Vincent HRD Black Lightning racing motorcycle to a speed of 150.313 m.p.h. When Rollie's leathers tore from early runs at 147 mph, he discarded them and made a final, heroic attempt without jacket, pants, gloves, boots or helmet.
Aboard the motorcycle owned by the California sportsman, John Edgar, this final run resulted in the most famous photograph in motorcycling, the "bathing suit bike" shot taken from a speeding car on the Bonneville Salt Flats in Utah. Rollie lay flat out on the motorcycle wearing only a speedo bathing suit, shower cap and a pair of borrowed sneakers.
One of the more famous pictures in motorcycle history.
The AMA certified Free's record. Special features included the first-ever Vincent use of a rear shock absorber, the first Mk II racing cams and horizontally mounted racing carbs."