by CJFonner » Sat Apr 14, 2007 5:05 am
An effective chain wont have much side to side play at all. I had this problem on my new 450R after about 3 rides. I replaced it with a new x-ring chain and havent had a problem since. Hate to break the news to you, but it's time for a new chain.
I guess it could also be that your rear wheel is out of line, but it would really have to be sideways for a good chain to hit it.