Go to
www.parktool.com to learn how to properly adjust these "stops" mentioned above. Or, take it to the shop and have them do it for you and while they're at it have them remove the spoke protector(dork disc). It requires a special tool to remove the cassette, but only takes about 2 minutes!
L8R
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"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger