Sport Pilot Talk

After I converted my plane to an ELSA I started to wonder if changing the jets in the carb would be legal since I do not hold a mechanics rating.
I live in norhtern Iliinois were we have drastic changes in temperature over the course of a year. This requires the main jet to be changed. Now that my plane has an N# do I have to pay a mechanic to do it? It doesn't seem like partialy disassembling the carb is considered preventative or basic maintenance. Anybody know if it is allowed?

i can't see where the N number changed anything. if you were qualified prior to the elsa registration than you should be qualified after. did you build it or but it?

jetting changes sound both basic and preventative to me.