I have a new left over 2007 Predator and the rear brake chatters and vibrates while riding. It's like it is out of alignment or something. I sprayed some lithium grease on the area where the support locks into the swingarm and it seemd to help for a while. Anybody else have this problem or here of this. It all seems straight and the rotor runout is only about .020, check it with a travel indicator.