I have two different trailers I pull from time to time. The 6'x8' snowmobile trailer is never a problem. When I pull my 16' flatbed trailer ( it weighs 1700 lbs) I usually have about 2-3000 lbs on it. I have found if the tongue is more than a 100 lbs, the proverbial tail wagging gets serious. Over the years I have put on new air bags in the front springs, The rear springs have been replaced new shocks and a couple of years ago I put on air bags in the rear to help with the springs. The rear bags made the most improvement. but I still want to put on a trac bar. Pulling the Tracker 4 down should be no problem because of no weight on the rear of the MH. would need more info on the motorcycle and trailer.