Ban Jing High Performance CDI and Coil Combo fits almost all GY6 / 4 stroke scooters. This combo allows you to simplify your scooter removing the need for a complicated wiring harness or extra parts.
Simply hook up the red wire to 12v switched, ground, and your stator pickup lead and your done.
From the manufacture.
"High Performance Microchip Programmed CDI/Coil for use on 50cc-500cc, 4-stroke Scooters.
Ignite your vehicle's true performance potential! This High Performance CDI/Coil gives stronger ignition/firing, a more complete combustion burn (more power, better fuel mileage and reduced emissions), quick acceleration and increased horsepower!
Installation is Easy:
Connect red wire to 12 volt switched source (DC)
Connect black wire to ground
Connect blue wire to the signal pulse of the stator (alternator)
CDI body can be easily mounted to the frame