Old post, I know, found it in the course of a search and may just be talking out into the ether. Nonetheless, perhaps an experience of mine can be of benefit to others. Navy guy, doing a change of station about 10-15 yrs ago and had a Valkyrie strapped in back on a trailer along with boxes of books and whatnot lining the sides of same. The straps had hooks that were hooked to any old solid projection along the side of the trailer. About a mile from my destination I hit some some bodaciously rough RR tracks and what compression was left in the forks and/or tires momentarily left and let the straps go flaccid. the hooks unhooked and the bike, luckily and harmlessly, slumped over on to some book boxes. From then on I used a bungie stretched across the floor of the trailer from strap eye to strap eye to keep some tension on the hooks and the hooks shoved home no matter the tension on the strap. Also, be advised that water is a good lubricant and can let the weave in your straps loosen significantly so do a round of tightening if you hit some rain. Seeing that bike in the rear view askew was a bad, bad feeling as I imagined it grinding around on the metal stanchions till I could get stopped. Lucky that time, won't be a next. As an aside, was stationed in Jax, FL and it seemed every year there was a report or three in the paper of bikes departing trailers on 95 to and from Daytona. It happens, be careful. You might not be going home impaired but maybe you were the night before when you loaded up.
"Freedom of speech makes it much easier to spot the idiots"
(This writer not excluded)
2013 ZNCC #109