Performance CDI Box - GY6/QMB139 - 49cc/50cc/125cc/150cc/232cc

Looking for an easy performance or reliability upgrade? This A/C Performance CDI advances your timing curve, removes the stock rev limiter, and delivers smoother power and a higher potential top speed for GY6 and QMB139 scooters.

The Details

This Performance CDI box updates the ignition timing curve and removes the factory rev limiter, giving your scooter a little extra punch and the ability to achieve higher RPM. While the power gains aren’t dramatic, the quality and reliability of this CDI are a big improvement over many stock and aftermarket options.

This unit is an A/C CDI. Make sure your scooter uses an A/C charging and ignition system before ordering. A/C CDIs are smaller, and scooters with D/C CDIs typically power the headlights as soon as the key is turned — even with the engine off.

Important Things to Note

• This is for A/C CDI scooters only
• D/C CDI units are physically larger and behave differently electrically
• Cosmetic appearance may vary, but internal components remain the same
• Compatible with 4-stroke scooters from 49cc–232cc using GY6 or QMB139 engines

Fitment Includes:

• GY6 engines (A/C CDI only)
• QMB139 engines (A/C CDI only)
• Genuine Buddy 125cc–150cc
• Taotao 49cc–150cc (A/C CDI models)
• SunL 49cc–150cc (A/C CDI models)
• All Chinese 49cc–232cc scooters (A/C CDI models)

Electrical items are not returnable — please verify your setup before ordering.

To confirm A/C vs D/C:
• Disconnect the battery switch at the ignition
• Try starting the scooter with the kickstarter
• If it starts → A/C CDI
• If it does not start → D/C CDI

What's Included

• 1× A/C Performance CDI Box