Complete Ignition Rebuild Kit for 50cc-125cc ATV & Go Kart

Product Overview

A complete electrical ignition rebuild solution for 50cc–125cc 4-stroke electric start engines, designed to eliminate no-spark issues, wiring failures, and unreliable starting in Chinese ATVs and go-karts.

Product Compatibility

Category	Details
Engine Type	4-Stroke
Engine Size	50cc / 70cc / 90cc / 110cc / 125cc
Start System	Electric Start Only
Engine Layout	Vertical Engine
Vehicle Types	ATV, Quad, Pit Bike, Dirt Bike, Go-Kart, Dune Buggy, 4-Wheeler
Common Brands	TaoTao, Coolster, Motowork, Sunl, Roketa, Kazuma, Chinese OEM brands
Not Compatible With	GY6 engines, horizontal engines

What’s Included in the Kit

Component	Description
Main Wiring Harness Loom	Full-length 1200mm harness for complete system replacement
5-Pin AC CDI Unit	Stable ignition timing across low and high RPM
Starter Solenoid Relay	Heavy-duty 12V relay for reliable cranking
Handlebar Kill Switch	Emergency engine shut-off for safety
Ignition Key Switch	Keyed on/off control with 2 keys
Performance Spark Plug	Optimized for 50cc–125cc 4-stroke engines

Specifications

Item	Details
Wiring Harness Length	1200mm / 47.24"
CDI Type	5-Pin AC CDI
Electrical System	AC-fired ignition
Voltage	12V
Installation	Plug-and-play replacement
Condition	Brand new aftermarket

Key Features

• Complete ignition and wiring system rebuild in one kit
• Designed for 50cc–125cc vertical 4-stroke electric start engines
• Eliminates common no-spark and intermittent power issues
• Extended 1200mm harness allows clean, low-tension routing
• Factory-style connectors for easy installation
• Built to withstand vibration, heat, and off-road conditions
• Improves starting reliability and overall electrical stability