On a yugo the valve is on the gas block up front of the gas tube.The gas valve. It is located directly in front of your rear sight, there is a lever on the right side of the sight that you will flip up to free the gas valve assembly. Pull back and up on the gas valve to remove. You will want to inspect bot ends of this tube for corrosion and if you theres nothing that you immediately notice to be unusual about the tube it should be ok. And of course inspect the bore. I would go with a Yugo!
Glad you clarified that.Seems like a lot of people confuse the the operating rod as some kind of gas channeling device when it is impact driven by the longer rod-the gas piston.The Yugo gas valve just allows for the gas to be shut off for launching grenades.On a yugo the valve is on the gas block up front of the gas tube.