There are a number of different airhorn gaskets for the Carter YF. Make sure that the bowl vent is not plugged. A plugged bowl vent will cause the symptom you report.

This carburetor is worth looking into. In my opinion, one of the most bullet-proof one-barrel carburetors ever built (except for the pump diaphragm).

Jon.


Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop