mk13

Yes you have right, with oil in gasoline the bubbles are significantly smaller (but there is lot of small bubbles).

I use a synthetic oil for 2 stroke from my supermarket (I can't remember the brand).

Yes I have for the moment the open curve from Guillaume. I will try with the solenoid electrically disconnected to set the needle a full throttle and after set the solenoid curve.

I will check the exhaust pressure line tomorrow if I find some leak, and will do the test of disconnect exhaust line from the muffler at full throttle.

​​​​​​Thanks a lot for all your way of investigation!
I hope I will find the root cause in the next days 🤞

1967brutus

Good luck testing, I am pretty sure we;ll find a solution, and this is exactly the reason why we should do this in the open discussion, not via non-public private messaging.

Let the learning continue!