I'll sell the trailer separately, but it is rigged as shown and purchasing the KLR with the trailer will save a new owner a lot of set-up time.
Neat rig! Intrigued by your trailer. Anymore info available on it? Homemade or purchased? Good luck with your sale.
If I separate them, it is my preference to sell the trailer first.
To answer the obvious question, hook-up and disconnect each take about 10 minutes (without trying for a record.)
Moto-Mule: I'm not sure what the status is for construction of the trailers at the moment. It appears, as of this date, that he isn't making trailers at present. You would have to look at his web page/facebook page for that information.
It does not come with a certificate of origin. It is considered to be home built. (The maker fabricated parts. The owner assembled it.)
A bill of sale confers ownership.
Registration: The owner is required to get title and registration IF that is required. It is considered to be homebuilt in all states. Some states require registration (and there are procedures for doing that published by the state) and other states do not. Because of the method of attachment, there is some argument that this adds a third wheel to the motorcycle and that the rig is a unit. At least some states would rule that it is a significant modification to the OEM vehicle and the "unit" argument does not qualify. The classification of a three-wheeled vehicle with handle-bars used to be "motorcycle" in all states; some states now have a different classification for three wheeled vehicles. I'll be happy to discuss this topic further, off-line (ftf, in other words, in a phone conversation) with anybody sincerely interested in purchasing the trailer.
There is, of course, no issue with using it off road. I've never had a problem pulling it down the road (highway, gravel, or dirt.) Personally, single track is challenging enough for me on two wheels. Typically, I tow to a camp spot and disconnect before trail riding. YMMV.
All trailers have three points of stability (at least). A single wheel trailer has two hitch points. The moto-mule design puts those at (or near) the terminus points of the rear axle (but this requires a hollow axle.) For the KLR650 (solid axle), there are special adapters for the end of the Gen-I (pre-2008) swing-arm that serve as the hitch points. Moto-Mule has, in the past, provided hitch point solutions for different bikes to owners of the trailer.
I find this trailer design to be an extremely stable design as long as you keep the trailer gross weight below 120 lbs. The tare weight on the trailer is about 45 lbs. The suggested load rate is 50 lbs. I have exceeded that without noticeable difference in handling, and the trailer is built like a tank.
Actually, I've used it for hauling groceries more than I have for camping.
Down the road, most of the time, you won't know the trailer is back there, but then, when towing a trailer behind a motorcycle, getting crazy isn't recommended. That stability is maintained at all reasonable attitudes of the bike. It will add somewhat to stopping distance just like when pulling a trailer with any vehicle; the increase is not extreme. People who use balanced braking without a trailer will have no problems when braking with a trailer. I've never noticed any difference in clutch usage when pulling.
The frame of the trailer is built out of thin wall 4130 Chromoly Steel Tubing. The joints are TIG welded and the entire frame is powder coated to ensure a long lasting finish. The bearings in the steering pivot, swing arm pivot, and wheel are all sealed bearings.
◾Coil Spring: 500 lbs.
Wheel: SyMoto 14" aluminum alloy, 1.40X14"
◦Hub: SyMoto cast aluminum alloy
Tire: Shinko SR244-01, #88-4400, DOT rated
◾4-Ply Nylon, tube type,
◾2.75-14 35P, MC, DOT H6 F8, RMA Size Code: 165/70-14
◾Rated for 93 mph with load of 267 lbs. at 33 PSI
The attachment shows the basic trailer design.