Werewolves on Wheels 1971

A biker gang visits a monastery where they encounter black-robed monks engaged in worshipping 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 satanic rituals, is now possessed and at night changes into a werewolf, with dire results for the biker gang.

Cast:

Severn Darden
One 

Billy Gray
Pill 

D.J. Anderson
Helen 

Steve Oliver
Adam 

Gene Shane
Tarot 

Carl Lee