This is an impressive swap, and I VERY MUCH like this conversion. I may have to get a 919 tank for my old 750 and make it look good. my only concern is that there may be a "hump" in the center of the tank on the bottom dividing it into front and rear sections as fuel levels drop unless you modify the tank so that its level with a slight rearward slope for fuel to follow.
But its proving once again that the CB is officially THE most universal motorcycle I've ever seen, and probaby that even EXISTS anywhere.