Got the X500 back. Rode it to dinner, then rode it for an hour. It was the first time in almost 26 years I did 60 mph on a 2 wheeler in the dark for more than 2-3 minutes. I was fairly nervous at times. I remember now why I don't like crossing draw bridges in the dark. The ride went well, though.
The scoot sounds ... deeper, and I think it is idling a couple of hundred RPMs less.
Time to start budgeting for accessories.... diamond plate foot rests, backrest with hand rail and plate for top box, top box, soft cases. Hopefully nitrogen shocks will increase the weight carrying capacity and won't cost too much.
... hmmmm... a blue and a white nitrogen shock on a red scoot...