I have a kouba screw and i even went up in the pilot so my screw is properly set at just 1.75 turns out, however I still notice that like every week or every other week I have to adjust it back to 1.75 because it vibrated out some. Anybody else have this issue or is my bike vibrating way more than it should?

Btw, it's an SF so only relatively smooth on road riding

 

Are you sure your o-ring and spring are still in place on the screw?

 

For my own knowledge... what do you mean "went up in the pilot"? Bigger pilot?

 

have the stock screw and never had to readjust in all the 1,000s of miles...

 

Mine has been fine on a S model for over 2 years as bike runs fine and I haven't thought to check it.

 

My Kouba screw doesn't move on it's own. It's not very easy to turn in the first place. As TNC said, check for o-ring and spring.

 

Set it....n Forget it...Put some blue Loctight on it

 

I never had problems with my stock one vibrating. I know I put the spring and Oring back in. Mine is actually kinda hard to turn too but somehow it still manages to vibrate about half a turn out.

 

Yes I put in a pilot screw I think 2 sizes bigger so I wouldn't have to turn my A/F screw out more than 3.5 turns

 

That's strange that it backs out on it's own. Maybe look for some way to safety wire it?