GREHUA Ignition Coil & CDI Starter Solenoid Kit for 50–125cc 4-Stroke ATVs — Plug-and-Play Repair, Voltage Regulator

GREHUA's all-in-one ignition coil, starter solenoid, CDI and voltage regulator kit replaces worn electrical components on 50–125cc Chinese ATV and dirt bike engines for a straightforward, plug-and-play swap.

If your small four-stroke ATV, go-kart, or pit bike is suffering from weak spark, intermittent starting, or charging issues, this GREHUA kit gathers the most commonly failing electrical parts into a single package. Engineered for horizontal 4-stroke Chinese engines used on models from Taotao, Coolster, SSR, Kazuma, Baja and many more, the set aims to simplify repairs and get the vehicle back on the trail with minimal downtime.

How will this kit affect starting and ignition reliability?

Replacing a defective CDI, ignition coil, or starter solenoid restores consistent spark timing and dependable starts. The GREHUA components are designed to match common OEM connectors and firing requirements on 50–125cc 4-stroke mini ATVs and dirt bikes.

• Includes a 5-pin AC CDI box to manage spark timing and ignition pulses.
• High-voltage ignition coil with lead for reliable spark delivery to the plug.
• Starter solenoid relay to ensure consistent starter engagement.
• Fast swap-in design minimizes time spent troubleshooting start faults.

Will this fit my specific ATV or pit bike model?

The GREHUA kit supports a wide range of Chinese-made 50cc–125cc vehicles that use a horizontal 4-stroke engine layout. It does not fit GY6 or CG engine types, so confirming engine layout and connector style before ordering will avoid fitment issues.

• Compatible brands: Taotao, Coolster, NST, SunL, Kazuma, Baja, Roketa, Buyang, Lifan, Redcat and more.
• Models listed include Taotao ATA-110/125 series, Coolster 110/125 variants, SSR 110/125, Coleman 125, CRF70-style bikes and similar.
• Designed for 50cc, 70cc, 90cc, 110cc and 125cc 4-stroke horizontal engines.
• Not compatible with GY6 or CG engine platforms.

How difficult is the installation and what’s included?

Installation is straightforward and intended for owners with basic mechanical skills; no drilling or major modifications are required. The connectors and mounting points mirror common OEM parts so you can remove the old components and install replacements in minutes.

• Package contents: 1 × 5-pin AC CDI box, 1 × starter solenoid relay, 1 × ignition coil with lead, 1 × 4-pin voltage regulator/rectifier, and 2 × A7TC spark plugs.
• Plug-and-play wiring harness style compatible with many Chinese mini ATV designs.
• Typical installation requires basic hand tools and reference to a wiring diagram if connectors differ slightly.
• No engine case modification or drilling necessary for standard fitment.

What performance or charging differences should I expect?

This kit restores original charging system behavior and ignition output rather than increasing engine power. Expect stable battery charging and consistent ignition timing comparable to factory components when installed and adjusted correctly.

• Voltage regulator/rectifier stabilizes charging for battery-dependent electrical systems.
• CDI timing provides consistent spark pulses across engine RPM range.
• Replaced coil reduces misfires and weak-spark symptoms under load.
• A kit approach reduces diagnosis time versus replacing single components sequentially.

Who is this for: The GREHUA ignition and charging kit is intended for owners and mechanics of small Chinese-made 4-stroke ATVs, pit bikes and go-karts who need a fast, affordable electrical refresh. It's ideal when troubleshooting points to ignition, starting, or charging components and when the vehicle uses a horizontal engine layout. If you require performance tuning beyond restoring stock functionality or if your vehicle uses a GY6/CG engine, seek vehicle-specific parts instead.