Hi Bla Bla,

... It all started when i got an DZ that would not run properly ... I guess i was unlucky, picking the wrong "YS-lottery- ticket". Besides, i do not even win in a "Cake-lottery", so i was not suprised ...

So, after some testing and research, i found that the Throttel barrel was leaking from the fuel metering-groove straight into the air-intake manifold. In addition, the barrel had leakage from the high press air side to the suction side ...
These parts ( throttel housing/barrel) seems to be critical about tolerances and temperature stability, so i decided to add two additional o-rings to the barrel.
In the Picture you can see the two red o-rings installed. (originally; only the black seal is installed from YS).

Hope this help ..
Kjell Olav