The old Yamaha Virago 535 is a great middleweight cruiser with a seat height of only 27 inches. After she learns how to ride, get her a Ducati Monster 620. Motorcyclist magazine hopped up a 620 and lowered it some more. Here's an update:
http://www.motorcyclistonline.com/fe...ery/index.html. If you want the original article, I'll have to look around for the magazine.