I went over the schematics on the shimano site for the rear derailleur but my 2001 model does not have a B-screw where the B-screw is supposed to be on the schematics. I can only assume that it's not adjustable and it relies on the spring that may be aging and no longer keeping it in proper position? It seems to be a lower end derailleur one step above the Tourney so if it continues giving me trouble I will have to step up to a Delore or something along those lines since those seem to be compatible with the shifter that's on the bike already and actually have a b-screw.