Glixal Atmt1-147 Gy6 High Performance Racing Blue Cdi Box 50Cc 125Cc 150Cc 139Qmb 152Qmi 157Qmj Chinese Scooter Moped Go Kart Atv Quads No Rev Limit

Before ordering, check whether AC or DC fired CDI is neededIf 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, reference dimensions not meant for racing CDIsIf engine will only run with battery, it is DC fired system.
If engine will run without a battery, it is a AC fired system.