OTOHANS AUTOMOTIVE GY6 Wiring Harness Kit for 125cc–150cc Engines — Full Copper Loom with CDI & Ignition Coil

This OTOHANS AUTOMOTIVE wiring harness assembly replaces worn or damaged electrical systems on GY6-style 4-stroke engines used in pit bikes, scooters, ATVs, and go-karts. Built with full copper conductors and weather-resistant insulation, the kit bundles the core electrical parts you need — CDI, ignition coil, spark plug, rectifier, solenoid relay, ignition switch, ATV handlebar switch, and magneto stator — to restore reliable starting and charging functions. It’s engineered for broad compatibility with many Chinese-made electric-start upright engines and multiple ATV brands, though it’s important to confirm fitment with your specific model before ordering.

Which models and engines will this harness fit?

The harness is designed for a wide range of GY6 4-stroke engines commonly found on 50–125cc to 150cc vehicles from many manufacturers. It works well with pit bikes, scooters, ATVs and small quads from brands like Coolster, Kazuma, Taotao-compatible machines, Kawasaki KLX-style conversions, and others listed by the manufacturer. Note that it does not fit certain Zongshen or Lifan stator variations noted by the vendor, so cross-check with your original harness and stator type.

• Fits many 50–125cc and 125–150cc upright electric-start 4-stroke engines.
• Compatible with brands such as Coolster, Kazuma, Motoworks, Taotao, Kawasaki KLX-style bikes.
• Not compatible with specific Zongshen/Lifan stator variants (see vendor note).
• Confirm model and stator type before purchase for optimal fit.

What electrical parts are included in the kit?

This full wiring assembly contains the common service parts required when repairing or replacing an entire electrical system on small motorcycles and ATVs. The boxed kit saves you sourcing individual components and ensures connectors and wiring lengths are matched for typical GY6 installations. Installation may require basic hand tools and a familiarity with small-engine wiring diagrams.

• Complete wire loom with full copper conductors and weather-resistant insulation.
• CDI module, magneto stator, ignition coil, spark plug included.
• Rectifier/regulator, solenoid relay, keyed ignition switch, and handlebar switch supplied.
• Plugs and terminals arranged for common GY6 wiring layouts.

How easy is installation and what should I prepare?

Installation is straightforward for someone experienced with small-engine wiring but may be challenging for first-time DIYers. Expect to match harness connectors, secure grounds, and route the loom away from heat and moving parts. A wiring diagram specific to your model speeds the job and prevents mistakes.

• Prepare common hand tools: pliers, wire crimpers, screwdrivers, socket set.
• Have your vehicle wiring diagram and photos of original harness routing ready.
• Secure connectors with dielectric grease and zip-ties; avoid contact with exhausts.
• Test the charging and ignition circuits before final reassembly.

What materials and durability features does the harness offer?

The loom uses full copper conductors for consistent conductivity and improved current handling versus cheaper alloys. Outer insulation and connector housings are made for outdoor use, offering resistance to moisture and vibration typical of off-road applications. While built to meet or exceed many OEM standards, long-term life depends on correct installation and vehicle conditions.

• Full copper wiring for stable electrical performance and corrosion resistance.
• Weather-resistant insulation and sealed connector housings.
• Designed to withstand vibration and exposure seen on ATVs and pit bikes.
• Meets common OEM-form factors for replacement convenience.

Who is this for: Riders, mechanics, and DIY hobbyists replacing a failing or incomplete electrical system on GY6-style pit bikes, scooters, ATVs, go-karts, and similar small-engine vehicles. Ideal when you want a single, comprehensive kit with matching wiring and core components to restore ignition and charging functions quickly. Verify your vehicle’s stator type and model compatibility before ordering to ensure a proper fit.