OTOHANS AUTOMOTIVE Complete Electric-Start Wiring Harness Kit for 49–125cc 4-Stroke ATVs — CDI, Stator, Ignition Coil

This is a complete electric-start wiring harness kit by OTOHANS AUTOMOTIVE that replaces the stator, CDI, relay, rectifier, ignition coil, solenoid and related electrics for 49–125cc 4-stroke ATVs, pit bikes and go-karts.

If you need a full replacement loom and ignition system after damage, corrosion, or to convert a non-working electric start, this kit bundles the major electrical components required to restore or upgrade most Chinese-made 4-stroke mini ATVs and dirt bikes. The package includes a labeled wiring harness and a printed diagram so installation is straightforward for a competent DIYer or a mechanic familiar with small-engine electrics.

Which machines and engine sizes are compatible with this harness?

This harness is designed primarily for Chinese-made upright 4-stroke engines and electric-start mini ATVs ranging from about 49cc to 125cc. It is broadly compatible with popular budget brands and models, but it is not universal for every motor—verify connector types and stator/CDI configurations before buying.

• Fits common 49cc–50cc, 70cc, 80cc, 90cc, 100cc, 110cc and 125cc electric-start 4-stroke engines.
• Works with many Taotao, Coolster, Sunl, NST, Kazuma, Baja, Buyang, Roketa, Venom, X-pro, Icebear, Coleman and Vitacci models.
• Compatible with ATVs, quad bikes, pit bikes, dirt bikes, go-karts and scooters using matching connectors.
• Not suitable for GY6 motorcycles or 200cc–250cc Zongshen/Lifan models with different stator/CDI designs.

What components are included and how are they wired?

The kit supplies a full set of replacement electrical parts so you can rebuild the bike or ATV’s charging and ignition circuits without mixing aftermarket parts. All parts arrive in a color box with a wiring diagram and labels to help reduce wiring errors during installation.

• Complete multi-connector wiring harness loom with labeled plugs.
• 5-pin AC CDI, stator (magneto), ignition coil with lead and spark plug.
• Rectifier/voltage regulator, solenoid relay, ignition switch (waterproof) with two keys.
• Upgraded multi-function handlebar switch, inline fuse, and ten cable ties for tidy routing.

Are there special installation notes or common pitfalls to avoid?

Follow the included wiring diagram carefully and confirm polarity before connecting to avoid short circuits. The kit’s red wires are positive and black are negative; some specific relay and stator connections require attention to avoid miswiring.

• Confirm your machine’s model and connector compatibility before purchase.
• Avoid installing on very old or heavily corroded bikes that may have hidden electrical faults.
• Do not connect the relay negative to chassis ground incorrectly—follow the diagram for positive relay wiring.
• Use the supplied fuse and tidy routed cables with the included cable ties to prevent chafing.

How does this kit improve repair time and reliability?

Replacing a full wiring loom plus charging and ignition components in one kit reduces part-sourcing delays and ensures connectors match. The extended link lines for the rectifier, stator and battery provide extra length for easier routing and fitting across different chassis layouts.

• All-in-one set reduces troubleshooting time when multiple components may be faulty.
• Extended cables allow cleaner routing and reduce strain on connectors.
• Packaged wiring diagram lowers risk of incorrect connections for experienced DIYers and mechanics.

Who is this for: This OTOHANS AUTOMOTIVE harness kit is intended for owners, mechanics and small-shop technicians who need a single-source replacement for damaged or missing electrical systems on 50cc–125cc electric-start ATVs, pit bikes and go-karts. If you have a Chinese-made 4-stroke mini ATV or dirt bike with matching connector types and want a complete, labeled wiring solution, this kit offers a practical option—avoid use on incompatible GY6 or larger 200–250cc machines.