what kill time do you have the qs set to? what oil ? check that ALL the shift linkage is free. It is easy for some brands of rearsets to bind. Show a pic of the rearset you have. yea, you could have bent shift forks worst case.
I was having the same problem with going from 4-5 gear and it's the kill timing on the qshifter needs to be reset.
that is a possibility, not that the kill time needs reset, but that the quick shifter simply needs "enabled". It shouldn't simply "disable" but depends on what you were working on, or what got disconnected. However, it would not work in any gears, not just have issues with gears he indicated in the first post. ?
I cant really put my finger on it!
I'm using this oil type for over 2 years, so that could not be the problem.
It is only active when pulling the bike hard, changing gears rapidly.
(15:47 is quite high rpm's!)
Will try changing the QS unit, but also want to pull the right engine 'cover'.
Could it be something with the springs?That pulls the shift rod back in place?
I'v got the feeling, my pedal keeps 'low'.
(I'm shifting GP style, upshift -> pedal down).