Setting up the needle valve was pretty simple but I am having problems with transition and idle.

Once I set up the needle valve, then I set the idle mixture to 1/2 in from flush. Usually have good transition at this point.

But if I continously test the transition, the engine stalls out at about 4-5th attempt. I does not matter whether the transition is fast or very slow. First few transition is very good but eventually stops. I've tried many diffrent mixture setting, but it does the same.

I used 15% cool power and tried 25% cool power. I spend about 3/4 gallon of 15% fuel so far. The idling is getting worst as I spend more fuel. 25% cool power improved low RPM but could not run the engine below 5000 reliably yet.

What is best way to set up the mixture valve?

I read somwhere in the past post that two turn in clockwize from flush is rich setting. I thought it is the otherway. Isn' t is the clockwize turn of the mixture valve lean?

thanks