Guide Pulley Is Rubbing Against All Cogs
I was riding today in a pretty hard gear, and i heard some rough clicking. The top guide pulley was way to close to the cogs, and rubbing against the teeth. I looked up some info online, including BF. I tried to adjust the b screw to pull the guide pulley away from the cogs, but it had no effect, no matter what extreme i adjusted the screw to. I've never had to adjust this before, and in doing so i noticed that the small disc that the b screw is on, moves freely. By which i mean it rotates freely about 10 degrees in both directions. I imagine if this was in a locked position it would have the proper effect when i adjust it. But like i said, i've never maintained the rear derailleur before. Any tips on an fixing this problem? if necessary, i can supply photos, or even video. Thanks.