Before replacing anything, test!

How much pressure is at the carburetor? Gauge!

What is the orifice size of the fuel valve seat? Measure!

Is the fuel valve spring-loaded? Eyeball test!

Too easy to throw money with the only results the lightening of one's wallet.

Test first!

And

(F)riendly (L)ocal (A)uto (P)arts (S)tore

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