lets cut to the chase. Top gear, that is small in back, big in front. I was getting this nasty noise. I looked down and back, and saw that my deraillur was doing funny thing. The Derailur looked like it was trying to go up into the rear cluster. The teeth from the top pully were grinding against the small sprocket. If I backpedaled a little, then continued to pedal, it would work out ok. In 23rd gear, things work smoothly.
It appears to me that my deraillur is not keeping proper tension. I was going to attempt a fix by increasing the b tension on the bike.
Is this the right path to be going down?