MOREV GY6 6-Pin AC 9-Curve Adjustable CDI Box for 50–150cc ATV & Go Kart

Digital adjustable AC CDI for GY6-family 50cc–150cc four-stroke engines. The MOREV 9-Curve CDI Box gives owners of compatible GY6 6-pin (4+2) AC ignition systems nine selectable ignition timing maps. It is designed for fitment-specific replacement or tuning of the ignition control unit on selected small powersports vehicles, with a push-button setting interface and a digital curve display.

Understanding the 9 Selectable Ignition Curves

Ignition timing affects when the spark fires relative to piston movement. Changing the timing curve alters how spark advance progresses across engine operating conditions, and may change throttle response, pulling characteristics and riding feel. This CDI provides settings 1 through 9. The MOREV curve guide describes settings near Curve 1 as favoring later-range power delivery and settings near Curve 9 as emphasizing earlier response. These are alternative ignition maps, not nine fixed horsepower levels or an assurance of increased engine output.

Features & Controls

• Nine adjustable maps: compare nine pre-programmed ignition timing curves to find the behavior suited to your engine.
• Easy push-button selection: the built-in button changes the selected curve; the digital display shows the current setting.
• Last-setting memory: the module recalls the last selected curve when restarted.
• Engine-running adjustment support: settings can be changed after the engine has started; make changes only in a safe, stationary situation and follow the supplied operating guide.
• Specific AC electrical configuration: built for matching GY6 6-pin (4+2) AC CDI circuits; not interchangeable with DC modules.

Engine Compatibility & Fitment Guide

Intended for selected GY6-family 50cc–150cc four-stroke engines with the appropriate 6-pin (4+2) AC CDI connector and wiring. Potential engine-family references: GY6 139QMA, 139QMB, 152QMI and 157QMJ-style engines found in selected scooters, mopeds, ATVs, go-karts and buggies. Verify the complete ignition configuration before purchasing. Select vehicle applications include scooters, mopeds, ATVs, go-karts and buggies, depending on wiring.

Before ordering, compare all four: engine family (GY6 versus CG), AC versus DC ignition type, physical connector arrangement, and the actual wire-to-pin assignments of the original module. Connector shape or advertised displacement alone does not establish fitment.

Electrical & Product Specifications

• Brand: MOREV
• Product: Digital adjustable CDI ignition box
• Engine family: GY6 four-stroke
• Ignition power type: AC only
• Connector: 6-pin, split 4+2 configuration
• Curve settings: 1–9, no setting 0
• Controls: Integrated button and numerical display
• Memory: Retains last selected curve after power-off
• Approximate dimensions: 72 mm overall width × 70 mm housing height × 27 mm thickness; 88 mm overall height including connector (manual measurements may vary slightly)

Installation & Important Warnings

The AC version is intended for a compatible magneto/exciter-powered CDI system, not a battery-fed DC CDI. 'GY6' identifies an engine family, not a guarantee that every GY6 vehicle uses this exact ignition unit. This item is the AC version only. The supplied GY6 wiring diagram is shared between AC and DC reference configurations because the power input uses the same connector position. For this AC CDI, terminal 6 takes power from the stator exciter coil, NOT battery +12V DC. The terminal-side reference labels terminal 1 pickup/trigger, terminal 2 ignition coil output, terminals 3 and 4 ground, and terminal 5 kill switch. Both ground terminals must be connected. Never connect AC and DC supplies to the CDI together, and never apply DC power to this AC-only module. Turn off the vehicle and disconnect the power before installation. Verify ground, pickup/pulse signal, ignition coil connection and the harness pinout against your original CDI. Incorrect wiring may result in no-start conditions or component damage; consult a qualified mechanic if the configuration is uncertain.

Frequently Asked Questions

Does every GY6 engine use this CDI?

No. Engine-family names cover multiple ignition wiring systems. This is the GY6 6-pin AC version only.

Are settings 1–9 RPM limits?

No. They are nine ignition timing curves. This product should not be confused with the MOREV DIP-switch speed-limit CDI series.

Does the unit return to its first curve after shutdown?

No. It retains the previously selected curve in memory.

Can I change the selected curve after starting the engine?

Yes, the control remains available after startup. Stop the vehicle safely before making any changes.

Shipping & Support

MOREV orders ship from Guangzhou, China. Available shipping destinations, charges and estimated delivery times depend on the delivery address and parcel weight. Review our Shipping Policy, or contact MOREV with a clear photo of your original CDI connector if you need help checking the configuration.