John - check your messages.
Looks like I used up one more of my chocolate flavored shoes when I replied John might want to go up a couple of thousanths on the main jet without looking at the spec sheet. Carter made a few YF carbs where the main metering jet is pressed into the body assembly and IS NOT GENERALLY THOUGHT TO BE REMOVABLE (Jerry - hush, not everyone can pull a pressed-in jet, make a new one on a jewelers lathe, and press it into place!). The 4371s is one of those.
The carb may still be recalibrated, but recalibration is done by changing metering rods. While somewhat difficult to do the math and calculate the diameters to cut the rod; the rod change DOES effect a better calibration change than just changing jets. Just more tedious, and somewhat more expensive. Before actually changing jets or metering rods on any carburetor, one can APPROXIMATE the effects of the change by adjusting the float to change the fuel level by a 1/16 of an inch, which is approximately one calibration size. One can generally save money by testing.
The kit for that carb contains:
1A-31 Flange gasket
17-78 Pump check needle
20-204 Needle seat gasket
20-237 Filter nut gasket
24-27 Float pin
25-965S Needle and seat assembly (spring loaded, correct orifice)
30-87 Bowl filter
30A-44 Idle mixture screw
61-451 Pump diaphragm spring
63-135 Retainer
63-149 Retainer
121-579 Bowl cover gasket
121-172 Pump lifter link gasket
121-319 Bowl filter gasket
121-598 Body flange gasket
150A-10 Pin spring
172-21 Retainer
172-24 Retainer
203-137 Pump diaphragm (red or black to the customer's taste)
If the jet had been replaceable, it would have also been in the kit.
I don't believe prices have a place in the forum threads, John has been supplied with the pricing. If John disagrees, I have no problem with him posting the prices.
Jon
