I have the 2 pictures below it looks like the bottom round thing is rubbing on my motor. Are those adjustable up and down? I hit a bump today and after that it started making this rubbing sound.
http://www.aksportbikes.com/pp1.jpg
http://www.aksportbikes.com/pp2.jpg
http://www.aksportbikes.com/pp1.jpg
http://www.aksportbikes.com/pp2.jpg