Hello Marty & welcome to the forum.
Choke issues are sometime the bane of AT ownership.
What you need to do is check the entire choke mechanism from the lever, down the single cable to the splitter where two cables emerge to go to each carb.
In my experience, the splitter is the usual culprit, as it collects moisture and crud, and the grease or whatever lube the factory puts in there make it all seize up. It is possible to clean and work in fresh lube, but you do have to take your time to work it into the cables. It may be better to replace the cable!
The next area is the springs and plungers. Again, these seize.
The parts you need to be VERY careful with are the plastic knurled nuts/retainers which hold the choke cables and plungers into the carbs. These get brittle and break, and it'll cost you £45 atleast if you do lose or break one.
The parts you need to look at are numbers 8 (x2) in the pic. This is where the choke cable passes into the angled tube 21, and then through the knurled nut.
The choke cable is in this one, item number 4
Bob
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