I don't know, I like the CB350 & 400 fours but, I would kinda hate to mess with them myself.
The 650 is alright, I've never had any dealing with them or the 750. The 750's kinda big for my
size (5'8'') so, that just leave the 500 and/or the 550. I actually have a 73' CB500K and 2 CB550Ks
(a 77' & a 78'). The 500 is mostly stock and the 550s, of mine , are prime suspects. I'm not saying
that I won't do anything to the 500, I'm saying that I'll keep it to where it could be stock, if
desired. Later on, Bill