I just bought a 2010 kingpin and Iove it, only problem is the guy who owned it before me had stage1 pipes and took the baffles out. The bike sounds amazing but 100 cubic inches straight piped is a little to loud. I was gonna put new baffles in but there's this weird bolt I can't find any info on. It's a hex head bolt with some kind of pin in the middle. Is the pin supposed to spring in? Did the other owner put this in?