Yamaha Warrior Wolverine Big Bear 350 400 Regulator Rectifier | 4KB-81960-02-00

Product Overview

Restore stable charging performance with this voltage regulator rectifier, designed for selected Yamaha Warrior 350, Wolverine 350, Big Bear 350, and Big Bear 400 ATV applications.

Built to replace 4KB-81960-02-00 / 4KB-81960-01-00 / 4KB-81960-00-00, this unit helps solve common charging-system issues such as battery not charging, unstable voltage, dim or flickering lights, weak electrical output, and intermittent charging failure.

Made with a durable aluminum alloy housing and heat-sink cooling design, this regulator rectifier helps dissipate excess heat, improve charging capability, and reduce the risk of battery overcharging. It is designed as a direct replacement when the connector, mounting-hole spacing, and original part layout match.

Product Compatibility

Brand	Model	Engine / HP / CC	Year Range	Notes
Yamaha	Warrior 350	350cc	1996–2001	Verify OEM number and connector style before purchase
Yamaha	Wolverine 350	350cc	1996–2001	Verify OEM number and connector style before purchase
Yamaha	Big Bear 350	350cc	1996–2001	Verify OEM number and connector style before purchase
Yamaha	Big Bear 400	400cc	1996–2001	Verify OEM number and connector style before purchase

OEM Cross Reference:
4KB-81960-02-00, 4KB-81960-01-00, 4KB-81960-00-00

Specifications

Specification	Details
Part Type	Voltage Regulator Rectifier
OEM Replacement	4KB-81960-02-00 / 4KB-81960-01-00 / 4KB-81960-00-00
Installation Hole Spacing	72 mm / 2.83"
Installation Hole Diameter	6 mm / 0.23"
Material	Aluminum alloy
Housing Type	Heat-sink cooling design
Function	Voltage regulation and rectification
Installation	Direct replacement on correctly matched applications
Fitment Method	Match by OEM number, connector style, mounting dimensions, and original part layout
Condition	100% New Aftermarket

Key Features

• Stable Voltage Regulation – Helps maintain reliable battery charging and electrical-system output
• Heat-Sink Cooling Design – Aluminum alloy housing helps improve heat dissipation
• Overcharge Protection – Helps reduce the risk of battery damage from excess voltage
• Direct Replacement Fit – Designed for easy installation when the connector and mounting layout match
• Durable Construction – Built for ATV riding conditions and long service life

Common Problems This Part Can Help Solve

This product may help address issues such as:

• Battery not charging
• Battery overcharging
• Dim or flickering lights
• Unstable charging voltage
• Weak electrical output
• Intermittent charging failure
• Regulator overheating or voltage-control issues

Package Includes

1 × Voltage Regulator Rectifier

Fitment Note

Please confirm your OEM part number, connector style, installation hole spacing, mounting-hole diameter, and original part appearance before ordering.

This listing is intended for selected Yamaha Warrior 350, Wolverine 350, Big Bear 350, and Big Bear 400 applications using the 4KB-81960 regulator rectifier family. Compatibility may vary by year, trim, and market version, so matching by OEM number + connector style + mounting dimensions + original part layout is strongly recommended before purchase.

If you are unsure about compatibility, contact us with your model, year, OEM number, connector photos, and original part photos before purchase.

Installation Note

Professional installation is recommended.

Before installation, inspect related components such as the battery, stator, wiring harness, connectors, and charging system to avoid repeat failure caused by another faulty part.

Why Choose This Replacement

A failing regulator rectifier can lead to poor charging performance, unstable voltage, dim lighting, battery problems, and unreliable electrical operation. Replacing it with a properly matched unit helps restore dependable charging-system performance and keeps your Yamaha ATV ready for trail or utility use.