It can only really be the main valve in the seat post that is stuck – i guess a proper bleed of both the post and the lever might sort it, but failing that, its gonna have to be stripped back down to see if the valve is stuck open…..which it must be
I have a 2011 reverb which I changed the the collar and bushings on about 5 weeks ago. Upgraded the barb at the same time. It has been used for about 7 rides since then and decided to bleed this week to make the return faster.
Worked a tweet and rode yesterday to find after a few miles it now wont lock. When you put weight on the seat it drops and goes to full extension without any weight on it.
Have just bleed it again and it is still the same, bleeding process as per Sram precedure.