The B1 with two holes at bottom of accelerator pump well, does get one ball in lower hole. That would be three balls in that style carb. If it does not work with that ball, I suspect something else in that carb is plugged up or mis assembled. The total driveability and performance will tell.
For anyone interested, watch this entire video and pay special attention at 25:48 minutes.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn