I use the pit bull system and have done so for the last 6 years.. it’s a little expensive to buy the first time, but every time I buy a new bike I just have to buy a set of rear adapters ($60) and it now works with the new bike! It’s really stable and easy to use, i have 2 mounted in my trailer and they hold my Tenere 1200, fz07, cbr500, crf450l, crf250x, crf250f and I have pins for other bikes.. when I am not hauling bikes, the brackets mount on the trailer wall to keep them out of the way and you are left with a small metal plate on the floor with a bolt at each corner that sticks up maybe 1/4 inch.. allows you to use the trailer floor for many other things.. I highly recommended the pit bull.