Can't get my rear derailleur tuned.
I'm trying my hand at setting up the most complicated part of the bicycle that I'm putting together - the rear derailleur. Using the Park Tool video on this, I think that I've set the high limit screw - I can force the shift from 2nd smallest cog to 1st by turning the H-limit screw while cranking, plus the pulley seems to be inline with the smallest cog. However, my indexing is going nowhere. On this 9spd cassette, I start tuning at the smallest cog. It all goes fine as I make my way up the cassette, until I try to tune the shift from 7th to 8th cog. To make that shift, I have to turn the barrel adjustor (BA) so much that the system will no longer shift from the 2nd cog back to the 1st again. After I turn the BA back enough so that the chain shifts back to the smallest cog (#1), it ruins the shift from #7 to #8 again. Is anything discernible from this description?