Well, the bike's going into the shop on Saturday, so I'll soon have the definitive answer. When I called my tech, he agreed that it sounded like the detent spring. Let's hope he (like most of you) is right. I'll post when I know.
BTW, I'm going to have the bike trucked over to rhe dealer, rather than riding it there, in order ro eliminate the possibility of further damage. Y'all think that's a good idea? It's a distance of about 10 miles and the tow will be free, since I have AMA roadside assistance with my membership (which I HIGHLY recommend).