1978 KZ200 With No Carburetor

Hello! I am brand new to this forum and also new to motorcycles. I just bought my first one last Sunday and it is a KZ200. I wanted a project bike so I could learn how the thing works so I can understand how to maintain it once it is fixed. I am very mechanically inclined and willing to learn!

But since I am such a noob, I have a question: since my motorcycle is lacking a carburetor completely and the pw26 Keihin that comes stock on it is so hard to find, how do I find a suitable replacement carb? Do I measure the opening where the holder plugs into the cylinder head? Mixing ratios?

Thanks for any and all help!

im in the same boat, im going to try some other options and ill let you know what i find . we have a cyle jun yard here in town imgoing tofins some other single cylinder carbs and also carb from akz 41

oops i pad is lame. i meant 1 of the cards from a kz1000