Around 30 years ago I read a book about an ordinary man that gets caught up with a violent biker gang. The leader was beefy and wore a black leather vest over his bare torso; he ends up murdered and is buried with his hog.
It isn’t The Devil Rides Out.
The cover I believe may have been a dark blue representing a night sky and a biker. It may have involved pagan rituals. There was something about the guy watching the goings on of the gang in some sort of disused warehouse.
The biker was named Bull but it isn’t the book series Bull