Been meaning to fix my MTB for a while now. The gears on the rear started jumping around a bit, but to be fair, the cassette had been on for four years, so well overdue a good service.
Bought new cassette, chain and jockey wheels. Shortened chain to correct length, installed...
And no matter what I do the gears are still missing one or two altogether, jumping straight up to the next one.
I'm not new to fixing bikes by any means. It's something I've always done to some degree since a small child, and I have indexed many gears with varying successes. Being a tight arse however, rarely do I work with a full suite of new parts, and I do often expect one or two gremlims -perhaps because of which, I've never been 100% happy with any gears I've ever indexed. Like ever.
Is it really that difficult? Or that easy to do wrong? Or is it more likely component issues (bent deraileur for example)?
Any tips, please?
Shifters and mech are matching Sram X-7, which came with the bike new. And I'm not sure it's relevant but it's also sticking occasionally in the lowest gear, and won't release without a little persuasion, despite the cable releasing.