#Repost @dcracerx #tbt to 1971 and the first-ever advertisement for the 1st Annual Florida Winter-AMA Series as well as the first Daytona Supercross, March 13, 1971, as it was part of this series— @promotocross and @supercrosslive had yet to be created. #VintageMX #Motocross #Supercross #Moto #ThisIsMoto @rcsxdaytona @wewentfast @racerxonline @unlimitedsportsmx