Yours are probably 627B, the carbs that were on the CB500, CB500K1 and CB500K2 in some markets. Although we are not a 100% sure the venturi are identical with the 069A, my guess is you can use them. There are some differences in the brassware however. The 627B carbs stock had mainjets #100, slow jets #40 and the needles show the stamped in number 272304, the 069A carbs had #98, #38 and 273004 resp. It's up to you if you want to give it a try or change the needle jet sets, main and slow jets. Do you have the stock air intake and exhaust? If not, I'd give it a try.
