Is your tongue weight capacity 500 lbs? 10% above seems a bit over what I would feel safe with. And that is a lot of weight to be on the rear of an RV anyway.
BTW, I carry my
Zero DS 7.2 KWH battery electric motorcycle on my motorhome hitch, only 317 lbs. Goes up the ramp on its own power, no clutch to deal with and the sidebags and travel trunk are removable. Seems to me the Burgman would be a poor choice to carry on a hitch. But I do know it has an automatic tranny and no clutch, but it won't have the very good slow speed throttle response of an electric, which is fully adjustable (via a Smarthphone via Bluetooth), but the eco mode works fine for such stuff as going up the ramp on its own power, but I can adjust it to anything.
I have done thousands of miles in my RV with my setup. Very handy. Very easy to load and unload with just one person and no help.
IMO, it's the perfect bike for an RV ramp. I do all my grocery shopping with it when the RV is parked.
The ramp I use needs no ropes.
ABHD
-Don- Reno, NV