Hi Dirt Dog,
I have used both the Moto-Jack Rack and the Ultimate MX Hauler for hauling dozens of different dirt bikes and dual sports. I prefer the Moto-Jack Rack because it is lighter, easier and faster to load and unload than the MX Hauler. Unfortunately, I don't think the Moto-Jack Rack is available anymore. They still come up on craigslist occasionally. These racks are great if you only need to carry one bike but they do have some downsides. It can be a lot of weight hanging off the rear of your vehicle and that tends lighten up the front end of your vehicle which can get kinda squirrelly at highway speeds. The bike can also block most of your rear lights and signals and also your license plate.
For carrying a TW with one of these racks you will need two mods. First you will need a real skid plate like the Ricochet model. Otherwise the entire weight of the bike will be resting on the engine cases. The other mod you will need will be larger footpegs so the tiedown clamps will fit through the pegs. Here are few pictures of my TW on an MX Hauler. These do not show the straps that I also use to secure the front and rear of the bike to prevent wobbling.
Let me know if you have any questions or need additional information.