First let me say I agree that you need to get the timing correct. Second I will say I dont think it is your issue. In past posts you have said that you took it for a ride and sometimes it is fine.
Everything you have posted points to fuel, choke or carburation issues.
In one post you said the choke goes to half way closed then went back to 3/4. This is not right.
I would recommend as your next test you disconnect the choke and wire it open, warm it up and take it for a spin.
Note if the engine is cold it will be hard to start with the choke wide open and you may need to baby the accelerator for a few minutes to keep it running.
If it still runs poorly you have eliminated one thing, the choke. Then move on from there.
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