Brand New Racing CDI for GY6 4 Stroke AC Systems Racing CDI for GY6 4 Stroke Engines 50cc 80cc 100cc 125cc 150cc **No Rev limit**. 6 Pin male plug 2 Connectors with a 2/4 split For: AC Systems Only ** This Does Not Work For DC Systems ** Fits Mopeds Scooters GY6 4 stroke 50cc 80cc 100cc 125cc 150cc engines Before ordering, check whether you have ( AC or DC ) CDI *If you have 3-wires going into the 4-plug side and 2-wires going into the 2-plug side you have AC Fire system. *If you have larger CDI box, 3 or 4 wires going into the 4-plug side and only 1 wire going into the 2-plug side, you have DC fired system. *Usually, DC CDI's tend to be larger in size than the AC ones. *Common AC CDI dimensions (LxWxH mm): 65x36x 22 or 58x33x22. *Common DC CDI dimensions (LxWxH mm): 75x42x24 or 96x55x24 Please Note: If engine will only run with battery, it is DC fired system. If engine will run without a battery, it is a AC fired system. Fits many models and makes of Chinese Scooters, ATVs, Mopeds and Go Karts. Ice Bear, Roketa, Sunny, Baja, Kazuma, Carroll Stream Eagle, Taotao, Panterra, Kymco, Redcat Tank Giovanni Wildfire Xtreme Seaseng Qlink Yiben Jonway Jmstar, Vento, Tng and Various unlisted makes/models. As well as many GY6 4 Stroke 50cc 80cc 100cc 125cc 150cc Stock # 263-999008 Please check your replacement part to the pictures we provided Comes As Pictured If you have any questions please contact us. For more parts check out our store. View more great items