Laredoct,
I added a rear receiver hitch to my 5er and bought a motorcycle carrier from Cabelas for $150 and it works just fine. And my motorcycle is also a Honda Rebel weighing in at 335 lbs. And it does not take off that much from the hitch. It only would if the distance from the axle to the rear was the same as the distance from the axles the hitch. It is more like a 1:2 ratio so it decreases the hitch weight by 170 lbs +/-. That being said, it adds the 335 lbs, plus the 170 to the trailer tires. So you have an additional 125 lbs on each of the trailer tires, assuming you have two axles.
The carrier I bought has a removable ramp and I can walk the Rebel onto it under power. To clarify, I walk along side the bike and run the throttle as it climbs up on the carrier. The manufacuror says not to do it that way, just in case you are a complete dolt running the bike. A bit of cya on their part. I use a few ratchet tie downs to secure it.
We put a couple of thousand miles travelling that way last year.
Here is a link to the carrier.
