I load two Harley's in the garage area of my XT276 at least once a year to travel to Sturgis. One in a Condor chock and the other in a xxx chock. Both are always strapped down.
Eagle- my wife captioned the picture just a little too soon. That was the day that we mounted the Condor chocks and some extra tie-downs. I use 4 separate 8,000-pound straps on each bike, and it's done correctly- no tension on the suspension itself. The straps are a bit heavy, but if I ever do get into a problem, I'd just as soon not have a big-ass bike (or two) flailing around back there!