Hello. I got some news on my DR. It runs. 😎
So after your suggestions I checked the compression, after some kicking attempts I couldn't get higher than 60psi and there wasn't no one to push or pull me in 3rd gear, so I decided to put that away for a while.
Then I decided to double check everything, bought some new spark plugs, new air filter, checked the voltage regulator, eveything seems fine. And again, no life. Then I decided to clean the carb 100% and YUP, I believe there was the problem, didn't have dirt in it, but spindles was covered in in lightly rusty gasoline, so I disassembled all carb out, some hardcore washing and air blowing of everything, some carb regulation on bike and there it is. Runs great, cold starts now almost every time on 1st attempt if not, the 2nd is 100%. One problem is there, the choke doesn't holds when pulled out, but that's no big deal, for now I put some spacer in there and warm it up.
So the lesson here is to DOUBLE CHECK everything.
Thanks for all your advice.