via : Mot'Art
Calvin Rayborn II (February 20, 1940(1940-02-20) – December 29, 1973 (aged 33)) was a top American motorcycle roadracer in the 1960s and early 1970s.
Born and raised in San Diego, California, Rayborn began riding motorcycles at an early age. He began his racing career in dirt track events in Southern California and in 1964, he began racing professionally in the U.S. Grand National Championship, a series which encompassed events in four distinctive dirt track disciplines plus road racing. Rayborn excelled at road racing, winning his first AMA national at Carlsbad, California in 1966.