Have a Schwinn Sierra not sure what year but it's got an odd handlebar stem. It's got a flex shock absorber as part of the stem assembly. It looks kind of like the trucks on a skateboard. I can't seem to find any reference to this type of assembly anywhere. The reason I'm concerned is because the bolt that goes through it has snapped apparently and I don't know how to replace it. I don't even know what this part is called.

Pre-MTB?
Need help . Mostly just info.. much appreciated

ZenTropi