Stupid chinese carbs leak behind the jets around the emulsion tube. Flawed design in the copy. So I fixed it with a couple O rings. Here it is with the jets that came with them, waiting on the kit in the mail to try other sizes. I'm sure air filters will help. I will try the smaller flat sides too. Notice I took the tubes off, I will put those back (I thought it might be resonating the gas out the front, but it was the leak)
https://youtu.be/oWezGZWU95U