There are many movies with promising titles and exciting poster graphics that never live up to their self hype. Like another tag line for the movie says, "If you're hairy you belong on a motorbike!"
I have never seen this film but I'm am guessing that the movie isn't as interesting as the poster for this 1971 biker exploitation film.
Take a look at the trailer here.
Update: I found the dvd on Netflix. It will arrive soon. I am not expecting much; but, hey, it's a werewolf movie.