So guys... I have solved it today... I had too big pilot jet... needle all the way down, so when I was lifting slide by idle screw, I was just adding air without fuel.. That was why I did not have to have airscrew turned out more than 1.5 turns... So today I started with turning idle screw out and turning airscrew out too.. I ended with idle screw just lighly touching the slide and air screw 4.5 turns out... so I swapped #45 pilot jet to #40 pilot jet... now I have airscrew almost 2 turns out from fully closed and idle screw just a little bit lifting slide... Bike now runs much better... it is like different bike... stable idle, no oil on exhaust, no sticky powervalve and much more power... thanks a lot.. I will write more after testing it for few hours...
here is a vid of my gasser idling...
https://youtu.be/P3CmEeXnjLI