Has anyone else had a problem with out of round sprockets? I went to adjust my chain because It was too loose. But after screwing around with it I noticed that my chain is loose at one point and tight in another. If I adjust it to the proper amount of slack it gets tight as a banjo wire when I spin the wheel and then loose again. I'm already planning on getting new sprockets and chain I'm just wondering if this was something I did or did the person before me screw something up. I don't want to have to mess with this again. I havn't had the bike that terribly long. Thanks for your input.