Unclear what the specific issue may be?
Might try adjusting the carb idle speed screw, and adding around 3 tablespoons of Iso-Heet to the gas tank.
Carb cleaning is complicated by tamper-resistant fuel bowl fasteners, and a plug over the low-speed mixture screw. Sometimes a pulse of compressed air into the inlet fuel line is effective.
Generally GY6 engine troubleshooting should begin with
checking valve clearance.
Check that sparkplug cap "clicks" on, ignition coil connections are snug, exhaust system fasteners are tight, and the screw in the metal fuel drain fitting has not backed out.
Performance ignition components and inlet air filters are a waste of money. Save yourself a lot of aggravation, and keep everything stock . . except perhaps experimenting with variator weights.