GREHUA GY6 Ignition Coil & AC CDI Box Kit for 49cc–150cc Scooters — 4+2 Pin CDI, Regulator, Spark Plugs

GREHUA's GY6 ignition coil and AC CDI box kit is a direct-fit electrical replacement for many 49cc–150cc Chinese scooters, go-karts and ATVs, restoring reliable spark and charging performance.

When an older scooter or go-kart refuses to start, misfires, or has charging problems, the root cause is often aging ignition or charging components. This GREHUA kit bundles the parts most likely to fix those symptoms: a 4+2 pin AC CDI box, starter solenoid relay, ignition coil, a 4-pin voltage regulator/rectifier and two A7TC spark plugs. It’s designed to match common GY6-configured Chinese engines (139QMB, 139QMA, 152QMI, 157QMJ) found across many TaoTao, Roketa, Baja and similar models.

Which vehicles will this GREHUA kit fit?

The kit targets scooters, ATVs and small go-karts that use the GY6 family of 4-stroke engines. It covers a broad list of 49cc–150cc models from popular Chinese manufacturers and selected 150cc go-carts and utility vehicles.

• Compatible engine codes: 139QMB, 139QMA, 152QMI, 157QMJ (GY6-style)
• Typical makes: TaoTao, Roketa, Baja, Ice Bear, Jonway, Vitacci, Panterra and similar
• Model examples: TaoTao ATM50-A1, Thunder 50, Powermax 150; Tomberlin Crossfire 150R; Hammerhead GTS 150
• Works with many 50cc–150cc scooters, 4-wheelers, go-karts and ATVs

How does each component in the kit help my scooter?

Each part addresses a different electrical function so replacing them together often resolves hard-starting, weak spark and charging faults more efficiently than swapping a single piece.

• AC CDI box (4+2 pins): manages ignition timing and pulse delivery for consistent spark
• Ignition coil: steps up voltage to the spark plug for reliable combustion
• Starter solenoid relay: ensures proper starter engagement and power flow
• Voltage regulator/rectifier (4-pin): converts alternator output to stable charging current
• A7TC spark plugs (2): fresh plugs improve ignition and throttle response

What should I check before ordering to ensure a proper fit?

Measure and visually compare connectors, mounting points and pin counts. Confirm the engine code and refer to wiring harness styles on your vehicle; many Chinese scooters use similar—but not always identical—parts.

• Verify engine model (139QMB/139QMA/152QMI/157QMJ) on your vehicle
• Compare CDI pin count and plug shapes with your existing unit
• Match regulator/rectifier mounting holes and 4-pin connector style
• Review the product images for relative size and orientation before purchase

Can I install this kit myself, and what tools are commonly needed?

Basic mechanical and electrical skills are sufficient for many DIYers; expect to disconnect the battery, remove body panels and swap components while keeping connectors tidy. If you are uncomfortable with wiring, seek a mechanic.

• Common tools: screwdrivers, socket set, pliers and a multimeter for testing
• Turn off battery before handling electrical connectors to avoid shorts
• Use thread locker or proper torque for mounting bolts to prevent vibration loosening
• Double-check grounding points and connector seating before final reassembly

Who is this for: Riders, mechanics and small-vehicle fleet owners who maintain GY6-based scooters, ATVs or go-karts and need a comprehensive electrical replacement kit to solve ignition, starting and charging issues. Ideal for owners of TaoTao, Roketa, Baja, Ice Bear and other common Chinese-brand 50cc–150cc machines who want a single-purchase repair bundle rather than sourcing parts individually. Please compare pictures and specs with your existing parts before ordering; contact the seller with vehicle details if you need fitment help.