bushing

Cause what most of the time? High RPM’s ? Low RPM’s? Both? Just noise? Symptoms in general? Your experience and thoughts? Especially pertaining to this new Sidewinder roller?

How many bushings is there in the rear suspension, I'm reading 8, but i only know where four are located....the 4 big ones that go on each side where skid mounts. Also, My rear arm that mounts to skid, i can pull it side to side a little bit by hand is this normal? Or mean its time for new...