when i do sprocket grinds the part of the boomerang that holds the little sprocket moves up so that it is hitting my chain stays, even when i tighten the bolts hard. now that little sprocket is really loose, like it has a lot of room on either side of the bearing and moves left and right when i pedal. how do u fix that and am i supposed to be grinding on the boomerang? (its hard to stay on the bashguard, even when u partially grind with your pedal)
