Short, squat, stolid, dependable-Cushmans (especially the gussied up Eagles) are often called “the mini Harley.” And when viewed alongside an old Harley-Davidson Knucklehead, the label seems apt.

Ask a guest at the Cushman Club of America’s National Meet why they like the old motorscooters, and you’re likely to hear that they bring back fond memories of youth. That was a theme heard this past ...