I recently checked and re-adjusted my valve clearances.
Afterwards, the bike ran on a higher idle.
I let it warm up completely.
Then I adjusted the "idle" screw.
Now this is the thing, the "idle" screw that I adjusted was on a kind of throttle mechanism/throttle body with a spring below the screw. I turned it very slowly, revving the bike and letting it settle to see what it did. In one direction it increased the idle, in the other it refused to idle. I eventually found a "sweet spot" by listening to the engine and bringing that rev counter to between 900 and 1000rpm.
Since then, on a cold start, it will only start if I use the choke. Once warmed it's fine. Even after starting from cold, if I let it run just one minute and the shut the choke off, it's fine. Previously in mid-winter I never needed the choke at all. SO now, I'm just wondering, did I actually adjust the "idle" screw or was I a dikwad and fiddled with the carb sync screw instead(thinking it was the idle screw)
Now if somebody can take a photo of a carb that you got on a work bench and please just point the "idle" screw from the "sync" screw, I'll be most delighted. I thank you in advance to put up a picture with two arrows, one pointing idle screw and the other sync screw. I understand diagrams. I do not get 10000 word descriptions.