Ruckus starting running really crappy out of nowhere.

So yesterday I went for a little cruise and I started to notice a minor what sounded like a “spitting” noise coming from the exhaust every few seconds. Didn’t matter what speed I was going, it did it continuously. It was a very quick spit/hiccup sound until it gradually got worse until the scooter started jerking pretty badly and I was barely able to get home. So went from a quick spitting sound to a very jerky sputtering and then I eventually had to turn it off and walk it home in fear of damaging the engine.

For some context, I purchased this GY6 swapped Ruckus a month ago that was sitting for 3 years. I have changed the fuel lines, fuel pump, fuel filter, spark plug, put in fresh oil and gear oil, installed a new carburetor, and did a valve lash adjustment. Scooter was running great until yesterday.

I’m quite new to scooters so not 100% where I should start but I’m learning as I go, so any help is appreciated.