Your right about the choke but mistaken about the stator. The stator has 3 separate coils that share a common ground. One coil powers the CDI with A/C and the voltage is regulated by the CDI. Second coil powers the head/tail lights and choke which are A/C (yellow wire) and the EXCESS voltage is then drained off through the regulator to ground. The third coil (white wire) goes directly to the regulator and is converted to D/C and regulated at 14.5Vdc to run more lights and gauges and charge the battery. So if you have one bad coil in your stator connected to the yellow wire, the other two circuits aren't affected.
Keep in mind that the headlights and perhaps some running lights go through the high beam switch first so the wire is a different color at the socket.
BTW if you run the bike with the regulator unplugged there is no place for the excess current to go except through the bulbs. This is why blown bulbs and blown regulators go hand in hand.
Everything you ever knew about wiring gets thrown out the window on chinabikes lol.