I've got a 2016 Chief Vintage I bought last winter as a factory demo. It had 4100 miles on the odometer and the first time I rode it was the day I brought it home due to horrible weather conditions. I noticed a noise coming from low in the bike when I hit a decent bump but didn't think much about it since I didn't know the bike yet and my concern was getting home before my fingers froze. That banging sound has continued to the point that it's annoying and is just wrong. I always thought it was the kickstand hitting the frame because I'd been through that before with another bike when I lost the rubber bumper that prevents that. Today I finally crawled underneath to check. It's not that and I can't find anything that is loose or would make that noise when hitting bumps. I just thought maybe someone could give me something to look for before I have to go through the hassle of taking it to the dealer just to find out it was something simple that any twelve year old could figure out.