TOPIC:

"We often get drivability questions with no history on the bike and then struggle to figure out what your problem is."

This is always an issue when trying to diagnose an issue !

There is another possibility; one which I've seen when rebuilding for others as well as on sets I bought from Ebay.  It would answer the question and solve the problem.  If these spacers are missing you are running the equivalent of having the needle c-clip in the # 2 slot (lean)



 

This ring is there. All parts inside of carburetor is original.

"This ring is there. All parts inside of carburetor is original. "

OK .  That eliminates that possibility.  Back to you Kawboy,  while I think of something else ! 

My morning caffeine just kicked-in and I had this thought:

Where do you live and what's the altitude there ?
I'd raise the main needles (groove #4), and see if this cures the issue !
 

The stock main jets should be #110 and if yours are #110 then try raising the throttle plunger needles to #4 groove as Scotch has suggested.

The #110 mains and the needles in groove #3 should be good from Sea level up to around 6000 ft above sea level. From 6000 - 8000 above sea level you would go to #105 but you're already running too lean.

Thank you for all ideas. At first i will try to clean holes again. I need to find energy for it....