Thank you very much TKG
the truth is that quize I didn´t know for what served that hole, I didn´t cover it by fear to that the motor lost power.
I will prove covered that hole and placing the ignition point where you has said me.
What type of escape recommends to me?
My carburetor is a ZAMA of 1/2" intake, is too small?

Good flights friend...[8D]