I have carried my bonnie on a crank up and down hitch carrier for many thousands of miles. I removed the steel trough for the bike and installed one of aluminum. I also modified the carrier with tabs and use two very heavy duty ratchet straps to eye bolts on the back end of my truck side rails. They take up a lot of the weight and stabilize the carrier. I also use a carrier pin that bolts the carrier up to the side of the receiver.
This appears to be the latest version of the carrier.
http://magnetatrailers.com/receiverhitchaccessories/dirtbikescootercaddy.html
Note in my photos that I had the carrier rails cut and welded up at 45 degrees to keep them from catching when backing up. I also drilled large holes where the eyebolts for straps are located so that I can put the s hooks in from inside to out to prevent worries of a slack one coming out. This also allows me to mount the lift mechanism to the truck and then insert the carrier. Much lighter and easier that way. This thing is strong. I was hit from the back at a stoplight and the carrier only dented my bumper, but it killed the car that hit me. No damage to the carrier at all. I have probably carried the bike 10,000 miles on this so far. I use a battery drill to raise and lower the bike. Can also do it with the hand crank.
Had to add air springs to the truck and with those, the truck rides level and handles well at highway speeds. Also increase the air pressure in the rear tires.
Note that the first photo was taken before the load straps to the bed rails and before the air springs. I also now have tabs welded on the carrier for the heavy load straps.
I avoid rough roads and dips or take them slowly.
