Seeking options to carry dirt bike on back of 5'er

I have the same trailer, I haul a KTM 500exc on the rack no problems. First thing I did was to fill in the stitch welds were the rack meets the frame. I then made a track with a turn up on one end out of 6" x 18 gauge track and bolted that to the rack. I tie it down buy placing a block under the skid plate and cranking it down with a pair of turnbuckles to the foot pegs.