Dropping 500# on the rear end of a Class C falls under the heading of "Just because you "can" do something does not mean it is a good idea".
Take a tape measure to your front fender/bumper before and after the 500# load is applied and see how much the front end rises. A trip to the CAT scale before and after will be even more revealing.
The problem that will occur is your front tire contact patch will shrink somewhat and the steering will get light. The 500# may not be a problem but you will definitely feel it.
With my bike and trailer weighing in at 900# I am adding just about 120# of tongue weight which I do not feel.
Besides.... if you get a small trailer you can probably get a larger bike. :B
As always.... Opinions and YMMV
:C
