Motorcycle on 5ver.

This has been discussed a lot, most don't think it is a good idea, especially for a bike that heavy. I have a factory receiver on mine, heavy 4" square tubing to frame. It's still just rated for 300 lbs, I think because of being so far behind axles, rather than strength limitation. I have a nice aluminum rack to haul my 230 lb offroad bike, but IMO, cannot be safely strapped on back of FW. Also sticker on ramp reads "not for use on back of RV trailer".

For 800 lbs you'd be best off with frame attached wheeled trailer.

Jerry