Reed valve with Mikuni TMX 30,flat. For this carburator which is better MMW 30mm or MMW 35mm

Anyone can i help me?

I want to intall for px200 a MMW reed valve but i'm not sure with the correct diameter MMW2 30mm or 35mm....The carburator is Mikuni TMX 30, flat.

 

Thanks

Hello this is not a answer but I am putting a tmx 30 with a mmw2 reed block on do you know if any mods needed to the side panel or frame on a 79 p200  to make it fit!!! Thanks Jeff