Well, of the "running ones", I have 3 (only 1 SOHC4 though) the '80 CBX, the '80 CB750K & the '80 CB650C.
Then, I have several ((of various states of being complete, or not) ranging from the CB77 (305) Super Hawk to the '79 CB750K
But, I figure that by "CB", you are most likely talking "SOHC4"s and of those I have only 1 running (that being the '80 CB650C) (w/ examples desperately needing parts and work, being a CB750A, a CB650C, 2- CB550Ks, a CB500K, & a CB400F