HackA, The CB and Cl cams are the same except for the K0 cam. I have not gotten a complete answer as to the particular differences between them. I have a K0 cam in my race bike. It has higher lift than the later cam, but it also has a larger base circle, too. I have heard that you have to use K0 racker arms with a K0 cam, although I don't know if the eary rockers have a different ratio than the later ones. I don't know what rockers I used when I built my engine since I hadn't heard that part. But, my engine seems to run well. I may tear it down and look before the June Road America race weekend, since it leaking a little oil at the rocker box anyway.
Ken