{"product_id":"otohans-automotive-wiring-harness-kit-for-4-stroke-50-125cc-atvs-pit-bikes-black-complete-ignition-charging-start-assembly","title":"OTOHANS AUTOMOTIVE Wiring Harness Kit for 4-Stroke 50–125cc ATVs \u0026 Pit Bikes — Black, Complete Ignition\/Charging\/Start Assembly","description":"\u003cp\u003e\u003cstrong\u003eA complete black wiring harness kit from OTOHANS AUTOMOTIVE that replaces ignition, charging and start components for 4-stroke 50–125cc ATVs and pit bikes.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis all-in-one electrical assembly bundles the main wiring loom with ignition, charging and starting parts so you can restore or upgrade the electrical system on compatible 4-stroke small-displacement ATVs, quads, scooters, go-karts and dirt bikes. The kit is built to be a plug-and-play replacement for many 50cc through 125cc engines (not compatible with GY6 style engines) and includes the key components technicians commonly swap when troubleshooting no-start, charging failures, or intermittent electrical faults.\u003c\/p\u003e\n\n\u003ch3\u003eWhat parts are included and why they matter?\u003c\/h3\u003e\n\n\u003cp\u003eThe kit groups every essential electrical component you need for a standard wiring replacement—saving time sourcing separate pieces. Each part performs a specific role in ignition, charging, and starting so the system works as a coordinated unit.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eWiring harness loom — the main cable assembly routing power and signals across the vehicle.\u003c\/li\u003e\n  \u003cli\u003eCDI (5-pin) — controls ignition timing for the 4-stroke engine’s spark delivery.\u003c\/li\u003e\n  \u003cli\u003eSolenoid relay — handles high-current switching for the electric start circuit.\u003c\/li\u003e\n  \u003cli\u003eRectifier \/ voltage regulator — converts AC to DC and stabilizes charging voltage.\u003c\/li\u003e\n  \u003cli\u003eIgnition switch with two waterproof keys — provides secure power-on control and theft deterrence.\u003c\/li\u003e\n  \u003cli\u003eStart button plug, ignition coil with lead, and a spark plug — key parts for initiating and sustaining combustion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is installation and what should I check first?\u003c\/h3\u003e\n\n\u003cp\u003eInstallation is straightforward for experienced mechanics; the harness is meant to replace factory wiring using the included connectors. If you are unfamiliar with vehicle electrical systems, professional installation is recommended to avoid damage or incorrect connections.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompare the supplied wiring diagram to your vehicle’s original layout before beginning.\u003c\/li\u003e\n  \u003cli\u003eVerify engine type—this kit is not for GY6 engines.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the battery and follow proper grounding and polarity procedures.\u003c\/li\u003e\n  \u003cli\u003eDouble-check pin assignments on the CDI and connectors during replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich vehicles and engines will this harness fit?\u003c\/h3\u003e\n\n\u003cp\u003eThis harness was designed for a wide range of 4-stroke small-displacement machines, including ATVs, dirt bikes, quads, scooters and go-karts within the 50cc–125cc range. Fitment still depends on model-specific connector layouts and mounting points.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompatible: 50cc, 70cc, 90cc, 110cc and 125cc 4-stroke ATVs, dirt pit bikes, quads and some scooters\/go-karts.\u003c\/li\u003e\n  \u003cli\u003eCommonly used with Kawasaki KLX style and Coolster-type chassis where wiring layouts match.\u003c\/li\u003e\n  \u003cli\u003eNot compatible with engines using the GY6 electrical design—verify before purchase.\u003c\/li\u003e\n  \u003cli\u003eIncludes waterproof ignition switch for wet or off-road use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat maintenance or safety tips should I follow after installation?\u003c\/h3\u003e\n\n\u003cp\u003eAfter installing the harness, perform a full electrical check and secure all cables away from heat and moving parts. Proper routing and protective sleeving will prevent chafing and premature failure during off-road use.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSecure connectors with zip-ties and ensure no wires rub on the frame or exhaust.\u003c\/li\u003e\n  \u003cli\u003eInspect the spark plug and coil connections after initial running for tightness and correct gap.\u003c\/li\u003e\n  \u003cli\u003eTest charging voltage at idle and with headlight load to confirm regulator operation.\u003c\/li\u003e\n  \u003cli\u003eReplace any damaged clips, fuses, or mounts to maintain reliable performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This OTOHANS AUTOMOTIVE wiring harness kit is aimed at DIY mechanics, repair shops, restorers, and riders who need a comprehensive electrical replacement for 4-stroke 50–125cc off-road vehicles. It’s especially useful when diagnosing combined ignition and charging issues, performing engine swaps, or restoring older machines where the original loom or components are corroded or missing. If you’re unsure about compatibility or wiring details, consult a qualified mechanic or contact OTOHANS AUTOMOTIVE for guidance before installation.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this harness work on my 110cc dirt bike?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it fits many 110cc 4-stroke ATVs and pit bikes, provided your bike’s connector layout matches and it is not a GY6 engine.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the kit include an ignition switch and keys?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the package includes a waterproof ignition switch and two keys for secure power control.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"OTOHANS AUTOMOTIVE","offers":[{"title":"Default Title","offer_id":48085423816862,"sku":"B08LK4M3WH","price":37.97,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/otohans-automotive-harness-front-view.jpg?v=1785870736","url":"https:\/\/northtrailauto.ca\/products\/otohans-automotive-wiring-harness-kit-for-4-stroke-50-125cc-atvs-pit-bikes-black-complete-ignition-charging-start-assembly","provider":"North Trail Auto","version":"1.0","type":"link"}