Hello Dave,
I'm still having problems, I turned the regulator in but its still the same.
Maybe I'm expecting it to to behave like other 4 strokes but it doesn't?
If i have the main needle out 5 turns should it be extreemly rich I mean like sputtering rich? Or does this motor not work that way?

It is working perfectly idles like a dream, transitions great, but I cant get it to go realy rich.
I even tried changing to coolpower 30% heli and changing the fuel filter.

Please let me know.

John