Re: What are these thingys
Yep! Those are part of the idle relief system. they control both water level inside the leg and amount of exhaust passed during idle. They plug into the engine--I,m not sure where because I have never taken one of those legs apart. However: On my Chrysler 60, the same parts screw into the midleg at the flange where the exhaust tube enters. So it is logical to assume that these plug in the same place.
I do have a 1989 125 and they have popped out of their seats. I found one stuck in the exhaust bellows. The engine does not even know they are missing.