Just say NO to test rides on a rocket!
Your insurance won't cover the potential liability!
Best reply......"I'll be glad to take you for a test ride, but my insurance doesn't cover another rider"
I sold at a dealership and know what can happen!
And then they will say.... "but I have insurance"
And then you say..... "insurance follows the tags, not the person, and my agent said absolutely not to allow another rider"
Also, after the sale, write on the bill of sale the date, time of day, and mileage, and make sure he signs it.