Uneven idling - help!

Hi there,
I am looking for an answer to my bike problem maybe someone here can help.
Have an '85 Yamaha Maxim XJ700 N with, a bike with an awesome 4-in-line
japanese engine that used to run great. Actually it needed a little bit of choke
to run smoothly which was annoying but not a big deal. Than suddenly it started dying on me if I stopped quickly or just left it idling. So the first thing I could think of was carbs, I opened them, cleaned carefully, put new gaskets on the connections to the cylinders too, so there is no vacuum leak and thought - that should be it! But, now it idles really unevenly and what's even stranger when I
pull the choke it dies! I have a feeling that I'm pretty close here but just can't
figure out the problem. Because the vibration is now greater I suspect it might
be the carb synchronization but I haven't checked that yet. Anyone has any ideas
why this could be happening?
Thank you all very much!

idling

You might want to check the valve adjustment along with the carbs. The metric bikes get tight valves that can hold them open and cause problems like yours. Dutch