Speedometer on a 1976 Vespa Bravo

[BravoMan]

Hey just wanted to thank everyone, I got my '76 Vespa Bravo running great this weekend. A lot of fun, sure am glad I found out about the idle jets.

Now that I am running, I realize the odometer goes around and clocks the miles but the speedometer needle is does not move. Any thoughts on how to get this needle moving after 25 years?