FAILURE in 110 CUB, GY6, 125 non-return engines vs. automatic decompressor "decompressor"

In this video I explain what an anti-return, incorrectly called automatic decompressor, is. I show which is one and which is the other step by step. This system (anti-return) is equipped mainly on 110cc Chinese motorcycles. and 125cc. CUB or Damas type and in GY6 engine type scooters. I also show those possible causes of failures that can drive us crazy and easily detect the problem.