Mario, that carb isn't DS80 nor is it F11 or F7 Kawasaki (the later is a rotary valve) I'd go with Johnny O in it being from a fourstroke possibly an atv. TK carbs wearn't used much by the jap big 4 as a rule, there were a few exceptions but these are mainly of the CV type on streetbikes. The way the overflow points straight down to me indicates it's probably a 4t carb as 2 bangers don't have a lot of space under the bowl to clear such protrusions. The external choke indicates it is not from a rotary valve engine and at 27mm it is too big to be a regular 125/80 or 50 carb. May even be off something like a Yam YFM200 trike or something like that
I can honestly say I simply do not know
late edit..after a bit of sniffing around it appears to be from a 1985 YAMAHA BW200 BW 200 (Big Wheel)