GY6 50cc–150cc AC CDI (6-Pin)

GY6 50cc–150cc AC CDI Compatibility Guide

This AC-fired CDI ignition module is a replacement for 50cc–150cc GY6 4-stroke engines used in many Chinese scooters and ATVs. It controls ignition timing and fires the coil so the engine runs smoothly.

Important: GY6 CDIs are not universal. Even on GY6 engines, CDIs differ by AC or DC type, plug layout and timing. Bring in your existing CDI (or ignition coil) and we will match it to the right one before you buy.

Specifications

• Type: AC CDI (powered by the stator, not the battery)
• Connectors: 6-pin — one 4-pin plug and one 2-pin plug
• Engine: 50cc–150cc GY6 4-stroke horizontal engines
• Size: 75 mm long x 42 mm wide x 24 mm thick (2.95″ x 1.65″ x 0.94″)

Compatible Brands (Select Models)

• Scooters & ATVs: Select Taotao, Tao Motor, Sunl, Roketa, JCL, Boom, Coolster and Ice Bear models with 50cc–150cc GY6 engines

Fitment varies by year and model, so always compare against your original CDI.

Which CDI Do I Have?

• GY6 50cc–150cc scooters & ATVs: 6 pins in two plugs — one 4-pin and one 2-pin. (This page)
• CG 125cc–250cc ATVs, dirt bikes & go karts: 6 pins in square plug housings. See the CG 125cc–250cc 6-Pin AC CDI →
• Chinese 50cc–125cc ATVs, dirt bikes & pocket bikes: 5 pins in one green square plug. See the 5-Pin AC CDI →

Still not sure? Bring in your old CDI and we will match it for you.

Signs Your GY6 CDI Is Going Bad

• No spark, even with a good spark plug and coil.
• The engine cuts out once it warms up, then restarts after cooling down.
• Misfiring, backfiring or popping under throttle.
• The engine will not rev past a certain point.
• Hard starting that gets worse over time.

No spark can also come from the stator, ignition coil, kill switch or wiring. Bring your scooter or ATV in and our service department will find the real cause — basic diagnostics are free.

GY6 CDI FAQ

What is the difference between an AC and a DC CDI?
An AC CDI is powered by the stator, while a DC CDI runs off the battery. They are not interchangeable — using the wrong type can keep your engine from running. Bring in your old CDI so we can confirm which one you need.

Will this CDI fit my ATV or scooter?
It fits many 50cc–150cc GY6 scooters and ATVs with a 6-pin AC CDI, but not all of them. Match it to your existing CDI — bring yours in and we will compare them side by side.

Do you have it in stock?
We keep GY6 CDIs in stock at 2916 S Santa Fe Ave, Los Angeles. Call (323) 588-6634 to confirm before you come in.

Can you replace it for me?
Yes. Our service department works on GY6 scooters and ATVs every day. Call (323) 588-6634 to book an appointment.