Post-apocalyptic Merc Biker with a Dog

I read this book in the mid 80s in middle school. I believe it was part of a series. It was an adventure novel, taking place in a post apocalyptic America. The hero is a biker with a Dog, a Pit bull i believe. The Bike had a grenade launcher and other stuff attached to it. It was very much in the Mad Max vibe, the hero goes from place to place getting in adventures, helping people survive and so on. . There was also sex in it. Can anyone help me find the title?