Глохнет на холостых или лечим хронические болезни китайского карбюратора

The scooter does not start well "on a cold", unstable idle engine speed, stalls at "idle", does not keep idling. Gases himself. Hanging gas when dropping gas. The problem turned out to be on the surface, this is air leakage from under the starting valve of the 139qmb scooter. My article on this topic is here: https://139qmb.blogspot.com/2020/03/b... 00:00 How air leakage affects engine performance 00:47 Replacement of sealing ring, enrichment valve 02:50 Scooter start with new ring 04:34 Gradual activation of the enrichment valve 5:33 Engine running at low speed, idling