I am not expert so the issue could be me but I want some other opinions just incase: When I am cornering (no set speed) I lean over a little, not knee down or anything, & I feel the back end of the bike kind of quiver a little which puts me right off & so I end up cornering a lot slower than I know the bike can go. The quiver is kind of like when you ride over the tar snakes or a groove in the road & you get the little back end wobble, you know what I mean? I know you do. Anyway, would this be caused by something to do with the bike, e.g. tires, suspension etc or me being a big wuss & nothing to do with the bike? I honestly think it is the bike but what do you all think? If it helps any, One of my friends thinks that the last owner of the bike may have does a few burn outs on the bike as there is a 2-3" wide mark around the center of the tire.