Thanks Jim,

I already made the ignition convertion.
I bought the FALKON CDI in France and maked the pieces to suport the propeller and glued the little magneto into the hub (for the sensor).
I did it because I supposed that the engine will be very heavy with the original coil and magneto...thanks anyway.
I will try to find this kind of Walbro carbs, but, what inlet diameter must to have?
My ZAMA has 1/2 inch (12,7mm), and has a manual pump to fatten the internal pump.
Thank you again Jim.

Sergio