A number of years ago I was riding my stroker 86 Heritage with bars to the stars (ape hangers). They had the two piece top clamps. I was only doing about thirty mph when it happened.....the right half of the handlebar, all of a sudden, was no longer attached to the bike except with the throttle and brake cable. It was very strange.....just the left bar to steer with while trying to get on the foot brake at the same time.......and trying to keep the right bar away from the tank so that I didn't scratch it with the jagged end of the handle bar.
Handlebars are not where you want to tie to when transporting a bike. Ideally, a 4x4 cross ways under the frame then the tiedowns strapped to the frame itself, to the point where it's sitting firmly on the 4x4 and not on the suspension. If you're hauling it in a pickup bed, then you want a sheet of plywood under it so as not to dent the bed or tailgate. These are heavy bikes with just a few inches of contact on the bottom of the tires......they will dent once you start rolling and hit a few bumps in the road.