It's funny if the instructor wasn't worried about and "He was there" what is everyone's worries.

I have an Alpha Trainer 40 and yes I has some of that same black stuff. It should start tappering off. One thing that's nice is that the Evo engines are sturdy and broken in at the factory.

They have already run the engine and set the adjustments.

What kind of fuel are you using? That may explain some of it.

If your instructor is at all knowledgeable he would have been worried and told you so...and if he is not...

Lefty