carb identification please

Can anyone identify these carbs for me. The only numbers I could find was Mikuni 31310 E3Y1. The rack, which is brand new and never been used, came with a box of parts for my 81 KZ750 LTD but they look different than the ones on the bike.

Looks like cvk34s The CVK34 is more modern and uses a choke plunger enrichener system like the Mikuni BS34... the earlier CV34 used on the KZ750 has a choke butterfly.

The 81 KZ750 ltd came with Keihin carbs, or at least those are what mine have on it. I'd be interested to hear what you think of the mikuni's, though, and definitely look me up if you decide to sell them.

chris

So far I haven't had much success in identifying them. I haven't pulled my own 750 LTD in yet to compare. I know they are slightly different from the spare rack I have. I will be selling these carbs. I am selling the whole bike actually.

CVK 34MMs