I spent the afternoon trying to find out why my new 950 carb is so rich, especially just at the start of throttle movement. I've leaned out all the primary stuff (IAB, IFR, TSR) and it idles fine at 13.8 but goes way rich (10.5-11) at very small throttle openings and 1500-2000 RPM. Driveability is fine, it's just wasting gas and darkening plugs. :(