Before I took this cylinder off I had it at 1 and quarter.  Quad was running perfect  on that setting,put it back on set everything back the same and it wouldn't close. I would run it wide open in 6th and end of the gear it would finally close with no top end power. I have 3 different springs tried them all no difference. It will only run decent at a half a turn. I m losing midrange from it closing it will not tune right. Either I lose some midrange or top end. The actuator  is super loose. I thought about rebuilding it with when I rebuilt the bottom end but it work fine then. When I had my other cylinder on it was doing the same thing to  but at the time I didn't know what was causing the problem. It has always worked on 1 turn or a little more. I guess it rebuild time with it. I m just wondering if their is one part in the actuator that goes bad or is it the whole thing.

Have you made any changes to the engine combination.  Changes in ports, pipe, head, ignition timing, air filter, carb or an extreme change in atmospheric conditions may require different power valve adjustment.