I watched lot of your YouTube video this afternoon, and when I saw your first tests without the solenoid it gave me the idea to do the same thing and see what happens 😁😁

So, I come back from my bearing shop and they can order for next Monday a new o-ring for the valve.
I bought 3L of fresh 95E10 (for a test tomorrow).

I will do the modification on the 25LA than you advice me (solenoid off, between the needle and the carb).

If I find in my mess some pneumatic fittings, I will try to put under a small pressure the housing + solenoid, and hunt some leak in a cup of alcohol.

Don't be worried Bert, I will do all the possible test to check the integrity of the solenoid, and if there is an issue we will find a solution together, I know you spent already a lot of time for this gazer conversion and you don't benefits, and I really thank you for that! 👍

I will try to thinking to hold my phone in landscape for the next video, sorry I'm a YouTube noob 🤣🤣

Regarding the vibrations, I tried holding the solenoid by hand while it was running but it didn't change much, still bubbles.
​​​​​I also thought about putting a piece of rubber between the engine and the chassis, but I'm not sure that a few millimeters of rubber significantly reduce the vibrations... What do you think?