Hello guys,
I'm back from the field and had a very successful day, but I've to earn it very hard. First of all it was quite raini and I had to jump in and out my car the whole day... and fix the YS in my very small vw...

in the beginning the ys won't start or even had one ignition... then I could start it with a lot of throttle and it runs in the upper range but stop in the lower... So I double checked everything and detched the carb with anything without finding any problem. So I just stick it together and give it an other try (rain has just stopped) and it fires and runs...

So i could make the first tuning with your suggestions in mind... I've used an 11/6 and the full throttle was faster than 12.000 but i make 2 flights with a richer setting to examine the inflight behavier. then i switched to a 12/6 and tuned the max. at 10.000 it throws the Prop so I tune it at 9.500 and the idle was about 2.000. transition was fine. the reg seams to be good at 1 ccw from 'flush'. RPM are stable at any point. I think I'm ready to mount the cowling.

If you agree or not, pleas leave a comment! Thank you for your support!

I think the gas port mod is beyond my qualifikation - i will think about it.