12V 4-Pin Voltage Regulator Rectifier for 50cc–125cc ATV Scooter Go Kart

Product Overview

Replace a damaged, overheated, or unstable voltage regulator rectifier with this 12V 4-pin replacement unit, designed for select 50cc, 70cc, 90cc, 110cc, and 125cc ATVs, scooters, go-karts, quads, mopeds, 4-wheelers, dune buggies, sandrails, and small powersports vehicles.

The voltage regulator rectifier helps convert and regulate charging system output before power reaches the battery and electrical components. A faulty regulator rectifier may cause weak charging, battery overcharging, blown bulbs, dim lights, unstable voltage, repeated battery failure, or electrical system problems.

This replacement regulator rectifier uses a 4-pin male plug and supports 12V electrical systems. Please compare your original regulator’s plug shape, pin count, wiring layout, mounting style, and charging system type before ordering.

Product Compatibility

Vehicle Type / Platform	Engine Range	Fitment Notes
ATV / Quad / 4-Wheeler	50cc / 70cc / 90cc / 110cc / 125cc	Fits select small Chinese-style powersports applications using a matching 4-pin regulator
Scooter / Moped	50cc–125cc	Common fitment for matching 12V 4-pin charging systems
Go-Kart / Buggy	50cc–125cc	Verify plug shape, pin layout, and charging system before ordering
Dune Buggy / Sandrail	Small-displacement applications	Fitment depends on original regulator and wiring harness
GY6 / QMB139-Style Applications	Select 50cc–150cc applications	Possible fitment only if the 4-pin plug and wiring layout match
TaoTao / Roketa / Jonway-Style Vehicles	Select models	Match by original regulator, not brand name alone
SunL / Kazuma / Coolster-Style Vehicles	Select models	Confirm voltage, connector shape, and pin layout before purchase

Important Fitment Note:
This is a universal-style replacement regulator rectifier for matching 12V 4-pin systems. Fitment is not guaranteed by engine size or brand name alone. Please compare the original part’s connector shape, male/female plug style, pin count, pin arrangement, wire colors, mounting holes, and electrical system type before ordering.

Specifications

Specification	Details
Product Type	Voltage Regulator Rectifier
Voltage	12V
Connector Type	4-Pin Male Plug
Pin Count	4 Pin
Compatible Engine Range	Select 50cc / 70cc / 90cc / 110cc / 125cc applications
Possible Extended Fitment	Select 50cc–150cc GY6 / QMB139-style applications, verify before purchase
Compatible Vehicle Types	ATV, Scooter, Go-Kart, Quad, Moped, 4-Wheeler, Dune Buggy, Sandrail
Common Compatible Brands	TaoTao, Roketa, Jonway, SunL, Kazuma, Coolster-style vehicles
Function	Voltage Regulation and Rectification
Fitment Type	Replacement, match by plug and wiring layout

Key Features

• 12V 4-pin voltage regulator rectifier for select small powersports vehicles
• Commonly used on 50cc, 70cc, 90cc, 110cc, and 125cc ATV, scooter, go-kart, quad, and moped applications
• Helps regulate charging voltage for more stable electrical output
• Helps protect the battery, bulbs, and electrical components from voltage fluctuation
• 4-pin male plug design for matching wiring harnesses
• Useful replacement for damaged, overheated, or unstable regulator rectifiers
• Direct replacement style, but plug shape, pin layout, and charging system type must be checked before installation