Number 1 cause of these fails: Stupidity…. Number 2 cause:
Using the wrong type of ramp (when loading street bikes and quads, you should always use curved ramps, otherwise they will bottom out, as these do and cause them to get stuck and throw you off balance) Number 3 cause: Bad friends standing around and just watching this stuff happen when they should be helping…
Plus – Never, ever, never load a bike using it’s own power and riding it.
Sure a lot of dumb asses who own motorcycles.
One mistake on loading your motorcycle and you’re done. its either you will get hurt, or your motorcycle will be damaged. so its better to sure.