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I can't remember the name of this movie

The movie was about guys riding motorcycles in britain or somewhere else over seas it was kind of a horror film guys riding around killing people and they also would ride to a satanic rock garden and and it would like knock them off their bikes also i remember like a skull patch on their back please help i think it was a 80s movie the guys looked english or had an accent thanks
asked Jan 24, 2015 in Name That Movie by shaner454ss (1 point)
I think there is more than one possibility, but I'll start with this:

"Psychomania" (1971)
aka "The Death Wheelers"

http://en.wikipedia.org/wiki/Psychomania

From Wikipedia:
Tom Latham enjoys riding his motorcycle with his girlfriend and loves his mother, but he is no ordinary fellow. He is an amiable psychopath ... who is the leader of a violent motorcycle gang who dabble in black magic and call themselves "The Living Dead". In a similar vein, his mother and her sinister butler get their kicks out of holding séances in their home. With her help (and following in his father's footsteps), Tom makes a pact with the devil to return from the dead. One by one, he and his fellow bikers commit suicide with the goal of returning as one of the undead. ... The ones who do return gather together at a secret place called The Seven Witches, a circle of standing stones, after which they continue to terrorize the locals.

Here's the movie trailer:
https://www.youtube.com/watch?v=gc8bHG4VB2w
...