Up4Speed,
In all seriousness, an easy (and relatively cheap) way to make your trailer easier to tow is to simply pick up an extra set of smaller tires for the X. I'd say go as small as you can while staying in the proper load rating for the vehicle. If you're pulling a trailer and motorcycle then Id assume you work on it, and probably own an air compressor. When you know you're going to tow the trailer, simply take the 1/2 hour to throw the smaller tire set on, and that should make pulling the trailer a little easier. Try throwing a set of warn manual hubs on to ensure that you have as little rolling resistance as possible too (so the front drive line isnt turning). All together, you're looking at about $500 tops for the hubs and wheel and tire set (less than the intake and exhaust-but those two will help as well.)