Carburetor adjustment screws

[ZombiePotatoSalad]

I was able to get the carburetor completely dissassembled, and soaked each body and jets in Chem-Dip.

Now, I'm trying a bench adjustment to synchronize each carburetor, but I ran into a problem: The screw heads are falling apart.
Now, one butterfly is stuck more open than the others, and half of one screw head is gone. Can the screws be replaced?

[Nessism]

Can you post some photos? Hard to imagine what's going on.

[ZombiePotatoSalad]

Can you post some photos? Hard to imagine what's going on.

Absolutely, my good fedora.

[ZombiePotatoSalad]

Here's the whole sausage

20190826_174933.jpg]

[ZombiePotatoSalad]

Broken screw head

20190826_174941.jpg

[ZombiePotatoSalad]

This one is on its way out

20190826_174959.jpg

[Nessism]

First off, use the center adjuster to equalize carb #2 & #3. Then use the outer adjusters to tweak #1/4 to match #2/3. Your center sync is so far out it's causing the outside sync adjuster to run out of travel.

[ZombiePotatoSalad]

#1 isn't tightening.

[Steve]

I'll check my box of spares.

.

[Big T]

Is the screw damage from the previous owner?

[ZombiePotatoSalad]

Is the screw damage from the previous owner?

No, it was whenever I was turning it. The #1 adjustment screw's bolt won't go back on the worm, as well.

[Nessism]

Not sure if this is clear but the nut should never be near the top of the adjuster screw like shown. You turned the adjuster way too far down. You need to back it off significantly before you can attempt to sync the carbs.

[fastbysuzuki]

Sorry if this sounds cheeky but you are slackening the locking nuts before trying to adjust the screws?

[bwringer]

To answer the question behind the question: yes of course these can and should be replaced, but they're an oddball fine thread so you'll need parts from another set of carbs. You can't just grab some screws from Home Depot.

This is a somewhat rare problem, and there are several folks here who have handled many sets of carbs, so it shouldn't be difficult at all to get a good used set of sync screws salvaged from a junk set of carbs.

And yeah, installing and using them correctly will help a lot...

Almost no force is needed to adjust these, so something somewhere sometime went badly wrong for these to get that chewed up.