The void where the main jet was crudely drilled out has been filled in and machined back to as-new, a new venturi is done and now an interesting, fairly delicate venturi spacer needs to be made. This spacer clamps the venturi in place, as the throttle body is screwed to the main body of the carb. As finished, the brass is only .025 thick. Pictures of that job follow:
First, brass tubing is cut to rough length and turned to size...then a sheet of brass is rough cut to an oversize diameter. Four very tiny bits of silver solder are placed inside and heated. The fillet is absolutely minimal and wicks to the outside to give a nice undisturbed fillet on the outside, too.
Next, the flat sheet of brass is brought to diameter and bored to the ID diameter of the U & J's throttle body
Then finally, everything is cleaned up and now the solder seam on the OD disappears as the part is given its final finish. Once installed, the part is functional and virtually indistinguishable from an original
If you're curious, that part took 5 1/2 hours make. Material cost of raw material - brass tubing and brass sheet was $45 before shipping. Boring from solid brass would have been a horrendous waste of material.
I probably could have spun this part like the original, but I don't think it would have been any faster.
To me, a "repair" is something that will make the carb work, and perhaps a bored out slug of aluminum made in 15 minutes would have worked. On the other hand, to my mind, a "restoration" puts the carb back to original - indistinguishable from as-new.
I prefer to restore.
This kind of work is neither quick nor cheap.
