I have a new Super Tiger 40 Ringed, I mounted it on a Super Decathlon, I broke the engine in by the book. Was running alittle rough at first but it came on after a couple tanks of fuel. Took it to the field, Where a friend tried to tune it better for me, He turned the Low-End Needle and now it cuts out when you let off the throttle it always starts back with ease. I can not find out how many turns the Low-End should be at "For a starting point"
I am using Cool Power 15% & The plug that came with the engine, I have even changed the plug to a Mccoy, Still does the same thing, It will run fine sometime's, Then just die sometimes at full throttle, But mostly from full to high speed idle or low idle, S I figured it has to be the low-end needle out of whack.

Any help would be greatly appreciated

Thanks [&:]