When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I've had a 1999, a 2002 and now I have a 2008 Heritage. Have never had any vibration on any of them. As said before the one that you rented had a problem. Go rent another one and try it out before buying one to clarify in your own mind that there is no vibration.
I would say the scoot has a steering head bearing problem may need adjusting or crappy front tyre that has a flat spot or inner tire wall problem.
Softails normally only have vibration when stationary at around 60mph I dont think soooo!
My '97 FLSTC did exactly the same as posted evn put my hands to sleep on trip from Pensacola to Houston (but that was off the showroom as tuned) until I put on SE A/C and SE slip-ons. Then went away. Think it has to do with stock stuff: the bikes don't like 'em!