(TRAILER) full video here: http://feelthetrack.com/2-clicks-out-shock-rebound-too-fast/
When shock rebound is out of adjustment it is most commonly too fast, for 2 reasons. First, it seems the factory shock rebound settings of most bikes off the showroom floor is set too fast to begin with. Why? Nobody knows. Second, as the shock ages with mileage the oil thins which speeds up the rebound circuit. Rebound is never going to slow down of it's own accord, only speed up. This video shows what fast rebound looks like when bouncing the back of the bike, the resulting telltale tire wear, and the strategies to solve the problem.