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

AC-fired and NO REV LIMIT, Connector: 2+4 Pin

Material of body: Alloy

Reset the ignition advance curve for better acceleration.

The pin configurations of a GY6 AC CDI (Alternating Current Capacitor Discharge Ignition) and a DC - CDI (Direct Current Capacitor Discharge Ignition) are different. This product can only be used as an AC CDI.

This product is only applicable to GY6 - Based Engines, such as 1P39QMB, 139QMB, 139QMA, 1P52QMI, 152QMI, 1P57QMJ, 157QMJ, 161QMK 170cc, 161QML 200cc, Chinese Scooter, ATV, Genuine Buddy,

Before ordering, check whether AC or DC fired CDI is needed
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, reference dimensions not meant for racing CDIs
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. AC CDI is powered from the stator

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