>>2758237The rubber-coated balls will smoosh and fall apart if you crank down on them too hard. The poly ones do better, but they'll slip more than the rubber ones do. Some guys have had luck smearing some RTV or roughing the balls up with sandpaper to get them to hold better.
I don't crank down on them super-tight, just enough to hold, and i've got about 20k miles on the ones on my adventure, and another 5-6k on the ones on my dirt bike.
A small bit of loctite (i'm partial to orange, stuff's designed for powersports use) on the ball threads helps a lot too.
