I know this is unlikely but could the cam chain have jumped a cog. Exhaust every possibility. Is your spark a good strong spark or kind of spindly?

I looked back on this thread and see you got the stator re-wound and a replacement CDI. Was it a new unit or used or aftermarket CDI. Is it the CDI with all the pig tails on it or the newer TCI with the plugs built-in?

The reason I ask is my 86 would start after many kicks, the spark was not too strong. IT ran but not the best and backfired plus it had numerous oil leaks. I put it in the shed last winter and started thru it replacing seals, removing the rockerbox and resealing, setting valves, cleaning carbs. the whole gamut. When I pulled it out to start it, no spark at all, my spare 84 xt's cdi was dead too so I tested everything I could to verify my stator and trigger coils were outputting, they were and the ohm readings were pretty close. I ordered 2 replacement CDI from Hyperpak in New Zealand and forever later I finally got them, plugged one in and I had a good healthy spark. With just a few kicks it started and ran better than it did in a long time. I took the other CDI just temp plugged it in 84 bike and it had good spark too.

So I say all this to show that the CDI's can go dead or almost dead just sitting around. I think the components go bad, capacitors dry out etc.

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'84 XT600 is now bored to 2nd oversize and new OEM pistons and rings installed. No more smoking.