Glad you got it figured out.
you had some solid advice

 

I have already emptied 3 tanks. The flight is ok. Extremely rarely appeared at the start - check the engine, but after 15-20 seconds it goes out. The motorcycle starts up and rides properly.

 

Again, something went wrong. This time at the start, I heard a strong rustle and cracking somewhere in the center of the motor. The inspection showed a strong metal sound in the timing area. What can cause crackle, as at the end of this video?
The cam shaft was repaired 12,000 miles ago: there was a replacement for cam shafts, tensioners, and timing shaft bearings.
The pressure of the oil is normal and does not fall on 0.

 

I'll just leave it here.