Among the firsts credited to BUMS was the first professional race in 1975 at Saddleback Park with a US$200 purse. Breithaupt also promoted in a joint venture with the new National Bicycle Association (NBA) (which was established the year before) what would later be called "Nationals" with the Yamaha Bicycle Gold Cup series in 1974. They were three separate qualifying races held at three separate tracks in California sponsored and heavily promoted by Yamaha Motor Company Ltd. to decide the first "National" No. 1 racer at a fourth and final race at the Los Angeles Coliseum. It was an achievement of import in the infancy of BMX, but it was not a true national since virtually all the events were held in California and almost all racers were Californians. It would be left for other innovators to create a true national event.