Chinese DC 4 pin CDI fits many 4-stroke models of ATVs, dirt bikes, go karts, scooters, and mopeds.  Many size engines require this CDI, including 50cc to 125cc.  Verify the number of pins and style of plug for best match of your CDI.

CDI description:

Known to fit Coolster, Redcat, and Tao Tao, along with many other manufacturers.