New Parts List reveals a few items of interest Tillotson AJ 10A is used on KB-3, KD-3 -1 and KD-3-2 each of which have Cowl, Carburetor 1399-538 SO same carb, same cowl AND same choke assembly 23224A2 This means the relatively uncommon KB-3 shares cowl, carb and choke with more common KD-3 singles. Missing choke assembly solved.
Louis
If the New Parts List is to be believed (sometimes The List need a little cross checking) KD-3 carburetor and choke assembly are the same. A side by side comparison with one or more known original KB-3 would move me from 99% to 99,00% sure. Best proof is always several known originals and sometimes even they will vary because Kiekhaefer was not always able to build as they intended.
