Name this biker/horror film?

Movie is a mix between motorcycles and horror from the late 80s to early 90s, where some bikers I believe were chasing some kids (can't remember why). One specific moment I remember is one of the kids gets caught and swallowed whole by one of the bikers after he unhinges his jaw like a snake. I have been trying to think of the name of it for a few days now and it's beginning to drive me nuts. Please help.