Hola,from SpainI own a Ducati Paso 750 cc, in Almeria, Andalucia, southern Spain mia since 1988, year in which the purchase new from factory. Never worked well managed because of Weber.
I got about 38 Mikuni.News BDST, but come with Monster 600 specifications, I think we should change gum high idle and needle, which brought the 750SS.
Could someone tell me what else should make changes or adjustments? Many thanks and regards from Andalucia

You could start with a Factory Pro or Dynojet stage 2 jet kit for a 750SS.
Follow the instructions in the kit to select jets and needle position for the style of air filter and exhaust on your bike.

Just so you know, I am still learning about Pasos (and checking ebay to buy one from the US). I have played with the Mikuni carbs though. Check out the Mikuni carb conversion threads/topics, there is alot of information there.

Good luck.

Welcome on ride, Pepe!