Werewolves On Wheels (1971)
A biker gang visits a monastery, where they encounter black-robed monks engaged in worshiping Satan. When the monks try to persuade one of the female bikers, Helen, to become a satanic sacrifice, the bikers smash up the monastery and leave. The monks have the last laugh, though, as Helen -- as a result of the aforementioned satanic tomfoolery and whatnot -- is now possessed, and at night changes into a werewolf, with dire results for the rest of her biker buddies!

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Slow Mary commented
If a biker turns into a huge, tattooed were-canine, will he end up chasing his own motorcycle?
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Kayleigh commented
... followed, years later, by the lesser-known sequel, "Yetis On Yamahas."
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Is Sara a Problem? commented
Fully lives down to its potential... and *then* some.
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Blind Al commented
A classic of sheer cinematic incompetence.
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Kyle's Mom commented
With just a little tweaking, this could easily be an episode of THE FUNKY PHANTOM.
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RReed commented
It's "Sons of Anarchy" meets "Scooby-Doo!"
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FitzhughLivesInTheWoods commented
Bring the pain! BRING IT!
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Anonymous commented
Please.
Please.
Please.
Please.
Please. -
derapt commented
Public domain.
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LifeStorm commented
It's been a long, lonnnnnng time since you've Riffed (or MSTied) a cycle flick. Just sayin'.
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sandrazmartin commented
How in God's name is this NOT already a riff?!?
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Virginia commented
The woman who plays "Helen" may actually be the single worst actress ever to appear on camera!
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Theresa commented
Oh yessssssssssssssssssssssssssssss.