The Wild Angels (1966)
The Wild Angels is a 1966 Roger Corman film, made on location in Southern California. The Wild Angels was made three years before Easy Rider and was the first film to associate actor Peter Fonda with Harley-Davidson motorcycles and 1960s counterculture. It was also the film that inspired the outlaw biker film genre that continued into the early 1970s.
More at Wikipedia.