The late-60's biker sub-genre take on the James Stewart Western, WINCHESTER '73, which is about a cherished gun, won in a contest then stolen from the winner before winding up in several different hands...
Only here it's a motorcycle that modern cowboy type Jeremy Slate loses the night of the race by his jealous rival, who then loses it to the token gang led by sixties' biker staple Adam Roarke, fresh from HELL'S ANGELS ON WHEELS and THE SAVAGE SEVEN...
So Roarke (with bulky sidekick William Lucking) is as comfortable in a biker flick as director Maury Dexter is at Westerns, since, earlier in the decade, he turned out a bunch for 20th Century Fox along with Neo Noir thrillers, and, like those entertaining and economical programmers, he moves an otherwise plodding exploitation decently enough for the viewer to remain semi-intrigued throughout...
But the true scene-stealer is the extremely gorgeous Jocelyn Lane, who Roarke trades Slate for the stolen vehicle and that he doesn't want (God knows why), and the title HELL'S BELLES is misleading since it's not about the other biker molls, all but passive commentators on their men, fighting with fists instead guns and riding bikes instead of horses, while Slate eventually thaws out from his initially reluctant relationship with Lane... Who wouldn't?