Main jet for Carburettor Kit SERIE PRO POLINI CP 23mm for Vespa 150 GS

Hi, My name is Rodrigo Onetto from Chile.

I have a Vespa GS150 1961.

I import a " Carburettor Kit SERIE PRO by  STOFFI'S POLINI CP 23mm for Vespa 150 GS" from SIP.

I need help about jet (main and slow). 

What size recommend ?? 

Santiago of Chile is a 500 meters from sea level.

Thaks and regards

 

Rodrigo Onetto