The Rebel Rousers (1970)

In a small, U.S. costal town, with many Spanish speakers, a motorcycle gang arrives on vacation. Also in town to try to reconnect with his pregnant girlfriend, Karen, is businessman Paul Collier. Paul and a leader of the bikers, J.J., knew each other years before, so when the gang comes upon the couple and, led by the menacing Bunny, beats up Paul and begins to sexually assault Karen. J.J. tries to intervene: he suggests they hold cycle-riding contests, with the winner claiming Karen (he promises, sotto voce, to set her free if he wins). After the contests commence, Paul crawls away to look for help. He meets with a shrug from a cowardly Sheriff's Deputy; where can he turn?