I was mistaken.
After heading back to the manuals I can confirm that the towing capacity is 1000 lbs. It is such a low number I had always thought that a tow hitch (it even had a Suzuki accessory tow hitch) was rediculous on a Sammy. Heck, that's more than a third its own weight.
Also, if you try to push the limit with a factory tow hitch you can bend the rear hoop out of shape. The only thing that hoop is really good for is protecting the gas tank a bit...