Angels From Hell is an entertaining film about a former motorcycle gang leader who returns home from the Vietnam War and sets about creating a new gang. The official blurb sums it up better than I ever could:
Mike (Tom Stern), a biker, returns to California after serving in Vietnam. He uses his war-hero experience to organize a new, united super outlaw gang. When one member is shot by police because he killed a girl at a pot orgy, an all-out cop vs. biker war results. Music by the Peanut Butter Conspiracy and the Lollipop Shoppe.
You can read more about the film here via IMDB.