Carrying a 500 lb motorcycle on the back of a Solitude 5er

I have an enclosed aluminum trailer that I've pulled behind my fiver several times. I also built a motorcycle lift for carrying my bike on the back. I think the trailer is safer ... a little less convenient and in some cases illegal. Loading too much weight behind the axle of a fiver causes the trailer to be more prone to sway. My bike is about 800 lbs and the lift and hitch probably another 200 or so pounds.