Go back to the configuration that worked before. These units (like most IMHO) work best in stock form. Stock airbox, filter, exhaust and main jet.
Make sure your float needle isn't sticking and your idle circuit clear, base setting 2.5 turns out. Easy to remove the carb to "do it proper" Great tutorials on this site.
When it runs fine again then add your "high performance" parts.
Draw your own conclusions about the "high performance parts".
Make sure you still have spark too. As the master used to say "If your intutition say's carburator best check the igniton, you are technician not a psychic"
Base suspicion would be crud in the idle circuit, masked when you added the large main jet so it runs too rich everywhere except idle circuit as it was running lean due to a plug.