Originally Posted by
CliffordK
A couple of things to try.
1 - Adjustment: You might try adjusting the B-Screw on the derailleur to get the shifter guide pulley as close to the cassette as possible without touching it in any gear.
2 - Maintenance: I assume you've checked your chain for excess stretch.
3 - Parts: Have you tried compressionless cable housing?
I forgot to mention that the B-screw was adjusted. Mechanic confirmed that I had done it correctly. Mechanic also measured (or whatever you would call it) the chain and said it had plenty of life left. I don't know what compressionless cable housing is yet (I'll look into it). However, machanic said they use same cables and housing in the shop that I put on the bike myself.