K110s twilight blowout.

When I pop throttle the twil blows out wildly. Full multi rotation tornado.

Is this common for these little helis or do I need to adjust something. Mechanically the heli is in good shape. Tried 2 different tail motors, with the same result so I assume it's a setup problem.

I backed off my pitch curve a little and it made it at least manageable. But it's still a big problem.