'Kay, here's the question from a bona fide Versys newbe:
When I bought the bike it ham mirrors loosened and folded. I took the wind shield off to rotate them freely. One mirror screws in ok, the stalk sticking out under a right angle. The other one rotates to a halt and stops under a wong angle, and no matter how much I tinker with the screw (or a contrascrew), it yields little to no result. The bike was not dropped or damaged, I just don't get this concept of adjusting the mirror stalks.
What's a crush washer??? Lost in translation here, sorry!
A crush washer is made of very soft aluminum and sometimes copper. When tightened, the nut will deform (crush) the washer and the irregularity will prevent the nut from loosening from vibration.
Copper crush washers can be re-used by annealing, which means heating until cherry red then quenching in water. Aluminum crush washers are for one-time use and should be replaced if the nut is removed during maintenance.