I have been able to change them with the carbs in place but have also had a stubborn one that required pulling the carbs. I had one that I had replaced not long before I need to do it again and one of them was still stubborn and I had to pull the carbs. That jet had only been in about a week too.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!