As I am working on my CB750F project I have been considering the wheels. I would Ideally like to run an alloy tubeless cast wheel like the Lesters on my 550, but the F model rear Lester is nearly impossible to find. I could change out to the Comstars from the F2/3, but they are 17" in the back and I would rather have an 18". There is a Henry Abe on Ebay right now, but it is a 16", even worse than the 17" on a "sport" bike in my opinion.
A less appealing option is to find a Goldwing or 750F front, which is aluminum and bolts right up, then just buy a separate 18" aluminum rear and lace it on to the existing hub. I was over at Buchanan's and just a plain rim, no spokes or anything is between $160 and $250. WTH? Not even polished, just a few dollars of aluminum sheet formed into a hoop and welded together with some holes drilled in it. The production cost per unit can't be more than $20-$25.
There's a guy at the Facebook CB750 parts group selling a set of F2/3 wheels for $130 (including the front rotors). Even though I would rather have the 18" rear and the Comstars aren't particularly light, I still think they look good and they are a very cost effective way to get the tubeless wheels I want.