I cruised at 60-65 mph 'indicated', the Vespa smoothly hummed happily along at that speed.
Amazingly, in the entire 102 miles I rode on hwy 44 and the park roads to get to Wall, SD, not one vehicle passed me, and nobody passed me on the 102 mile trip back to Rapid City, though I passed two cars. My gas mileage was a bit of a disappointment at an average of 63 mpg, I was hoping to see something closer to 70, but it's a nit-pik in the big view of how great this 300 Vespa is overall.
The total miles covered for my breakfast ride adventure was 240.

SD Badlands