Missing check valve parts in carb bowl

Was digging into the carbs a bit the other day and noticed one of the carbs was missing the check valve parts in the bowl (ball, weight, clip, o-ring) are these pieces mandatory or is it a better safe than sorry type of thing

I think the check valve helps to keep the pump nozzles primed with fuel.
Each carb bowl should have a ball, weight & clip, and each nozzle should have an o-ring at the base.
Also, the check valve may keep the accelerator pump circuit from flooding or something like that (see quote):

By WG: The check valve is in each of the four bowls and keeps gas from just filling the accelerator pump circuit without any restraint. There is actually a valve in the bottom of the #2 bowl that you can't get to and often clogs with today's bad gas and then gas is forced into the other pump circuits (the small gas hose hung on the lateral gas barbs on the bowls) through the check valves. The check valves consist of a bb, a small brass "rod" and a wire clip to hold the latter two bits in place. The only way to buy replacements is to buy an accelerator pump kit which includes those items.

Try jetsRus.
Steve

I bought mine from redline cycle in Skokie IL

I deleted the pumps off a set I have, could throw the clip spring etc in an envelope and mail it out; you pay for the stamps

28 pumpers right?

floivanus wrote: I deleted the pumps off a set I have, could throw the clip spring etc in an envelope and mail it out; you pay for the stamps

28 pumpers right?

Sounds great!! As far as I know but I think most of them are the same. Just let me know how much and we'll go from there

I can pop the parts out you need, clip spring ball etc, just need one carb's worth?

Send me a PM, we can hash it out

floivanus wrote: I can pop the parts out you need, clip spring ball etc, just need one carb's worth?

Send me a PM, we can hash it out

Actually I think I might need 2 sets. Is there supposed to be one on the accel pump bowl