Wolfgang, DannyP & Gordon,
That's some very good advice. Wish I'd known about those adjustments sooner.
I got so tired putting up with the original speedometer that came installed in my Vintage Speedster I replaced it with a VDO GPS Speedometer purchased from Beck/Special Edition, Inc.
It's very accurate, and has probably prevented me from ever getting a speeding ticket; however, there is one problem. Every time I drive 1000 miles the Odometer reading will then revert back to 00000.0. What's with that?
Rump sputter!