About a week ago I went for a 20 mile ride. During the ride the speedometer stopped working. It had worked for about 200 miles. After much trouble shooting I was able to determine the electronics of the pickup are in good working condition. The mechanical side had gotten egged shaped and the slot widened so that it would no longer spin. If I stuck a small screw driver in and spun it, the speedometer worked.
I found a NOS speed sensor assembly on e-bay. With the new unit installed the speedo is working again.
-MD