I had a little annoying issue with the Harley. When the tour pack (big trunk thing in the back) was on, but Amanda wasn't, it rattled pretty badly. It also made the bike a little bit less nimble because of how high the weight rode. The cure is a quick release sissy bar that can be mounted when the tour pack is off.
I had the pad made by the same folks that made the seat:
And then I found this skull back plate with blue eyes:
SO, now when I ride solo, no rattling.... and when Amanda comes on local trips, she can ride without fear of sliding off the back..... and if we want to go on longer trips, the sissy bars snaps off, and the tour pack goes back on.
I'm going to ride a lot more this year. I spent most of the season rehabbing it last year.