After receiving back a set of carbs from vapor blasting, I noticed one of the plugs covering the idle fuel metering area is missing. Looks like wax, feels like plastic on the other carb. Any ideas on what a suitable replacement plug would be?
Also, There looks like a brass circle. On one carb there looks to be a small hole in the center, but the other carb it's not so obvious. Is that a passage that needs to be cleaned/open?