re"> My new YS CDI has finally flown in a Comp-arf Valiant - 4 flights. Awesome!! Surprisingly, after 4 flights, the needle valve is only open a little under 3/4 open!! The regulator had to come out atleast a turn from flush. Even then the engine has an occasional rich cough. Running a 18.1x11 APC. 

The second flight dead sticked when the needle valve was still at a little under 1 turn. Had to close it a few clicks to get it humming again. But all was well after that. The engine behaviour was consistent for the remaining flights. The engine is running cool as well. Head temps straight after landing were in the 'touchable' range!!!! Running 10% cool power red and 20% nitro mix. All seems to be well. I can't wait until the next session!

Will post back after the next session to highlight any changes in the engine behaviour. I'm 'almost' 100% confident with it.

Rgds

Mayur