Thanks to Larry, I found out and fixed the chatter problem. The end of the return spring was not around the bolt, so I used the trusted needle nose pliers and
a screwdriver and it went over with not much trouble. I started it up and all sounds quiet. As soon as the rain stops I'm going out riding again.
Thanks to all of you for your information and help.
Scott, (I expect all future fixes to be as easy, Moll)