I have a Kymco 150 scooter that weighs 220#. I plan on putting it on the fold down rack on the back of my 320RS. It's good for 450#.
I also have a scooter carrier that mounts in a 2" hitch receptacle, which I have mounted on the front of my RAM. The carrier instructions specifically states, "Do no mount on rear of RV". I think the rear bounces too much for the scooter carrier.
Good luck with yours.
2013 Palomino Columbus 320RS
2007 Dodge RAM 2500 6.7 Cummins
Reese 15K manual slider
M.I.L. in Florida for good!!