Neal, If you don't have any port work done to your cylinders, don't bother with this. My RS125 PJ38 carbs make much more power on my bike but my cylinders have modified porting and a 2mm overbore.

I measured the resistance from the TPS with the throttle open. I believe it was 5k ohms. I then removed the TPS from the MC28 carb body and carefully rotated it until the resistance was the same and then put a little RTV to hold it in that position and plugged it back into the wiring harness. My air solenoids are buried in a box in my garage.