ORIGINAL: FILE IFR
I forgot to tell ya, Loosen the small set screw at the carb's blue bezel ring.... this will allow you to turn in the low speed screw. If you don't, it will bottom out the blue bezel to the carb body and not allow you to make a leaner adjustment.
YES! Extremely important point!!!
Pulling the pin alone is NOT enough. The collar prevents the needle from going in further, even if you've removed the limiting pin.
You MUST loosen and temporarily remove the blue collar. After you have adjusted the engine you may re-install it if desired.