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cjr
Kanj
Sorry for the dredge but I'm having exactly the same issue with an 8070 lever. It doesn't seem to spring back as far as it should (has quite a bit of play at the end of its return travel) and braking has got progressively worse over the last few weeks.
Tried to bleed it but just can't push fluid up from caliper to cup, I've pushed quite hard on the syringe but it feels completely blocked. When I press the lever, fluid flows out of the caliper so it seems like there's a block between the master cylinder and the reservoir in the shifter rather than the hose/connectors. The free stroke adjust also doesn't do anything as you mentioned.
Was your fix as easy as removing the shifter from the bars? Any idea what this did to free the blockage? Has it been ok since?
Thanks