MOTO-Tote Carriers,
As previously stated the Princess Auto Trailer Hitch Carriers are great for Dirt Bikes and I have several customers who use them with their KAYO MiniGP MR125 Race Bikes.
The MiniGP Bikes weights are generally at or below typical dirt bike, 250cc - 450cc like a SuperMoto or MX style racer,
Frank from Westaskiwin, had me ship him a Moto-Tote, built to carry a sport bike on your hitch, Click on the link below to check it out.
http://www.mototote.com/MotoTote-MTX-Sport-Motorcycle-Carrier.html
Easy to stow and super solid carrier for sport bikes,
Having said that, If you can find a storage location for a small Snow Bear or Kendal style trailer that you can set up a wheel chock on it is nice and transport on the trailer. Check Craigs List and Kijije for a well priced used trailer if you go that route.
Enjoy the ride, and best regards,
Blair