I have a Sarge Industries Carrier that I have been using for a couple of months. But I have only toted my KTM dirt bike around. I got a heavy duty class III hitch that is rated at 500 or 550 lbs, but I haven't had the balls to throw one of the ducs on there yet. Once I get the track bike done, I'll be temped too. Don't forget to add the weight of the carrier to the weight of the bike. The sarge is all aluminum so it only weights forty pounds which is atleast 10 lbs lighter than the steel versions out there. Good luck if you try it, but I probably won't.