The overflowing fuel is due to your float not working properly. Lots of things could be going on:
- The needle could be getting hung up
- The seat might not be clean or has a nick/burr
- The float may not be floating (hole, bent, too much crud stuck making it heavy).
All your other settings will be out of whack if your fuel level in the bowl is off.
Did you save your old parts? The reason I ask is that I've seen incorrect float needles before that are too short. Compare your old float needle with the new one. Also, to check your float height. To do this, hold the carb in your hand with the float bowl removed. Hold the carb sideways so that you can carefully move the float and check when it just starts pushing on the spring loaded button on the float needle. When it just starts to push on the needle, the float should be parallel with the float bowl mounting surface.
- Frank
1984 200ES Big Red
1985 350X (x2)
1986 350X
1986 250SX
1984 Auto-X
1984 ATC70
1985 ATC70