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Yamaha Warrior Wolverine Big Bear 350 400 Regulator Rectifier | 4KB-81960-02-00
Yamaha Warrior Wolverine Big Bear 350 400 Regulator Rectifier | 4KB-81960-02-00
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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.
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Fitment FAQ
Will this part fit my specific model and year?
This voltage regulator rectifier is intended for Engine / HP / CC. Listed year information includes 1996–2001, 1996, 2001. It is best matched to original part number(s) 4KB-81960-02-00, 4KB-81960-01-00, 4KB-81960-00-00, 4KB-81960. Key physical/spec details from the product data include Installation Hole Spacing: 72 mm / 2.83", Installation Hole Diameter: 6 mm / 0.23", 1 × Voltage Regulator Rectifier. Use the compatibility table and product photos together before ordering.
Do I need to match the OEM part number?
Yes. Match your original part number to 4KB-81960-02-00, 4KB-81960-01-00, 4KB-81960-00-00, 4KB-81960 before purchase. For this voltage regulator rectifier, also compare the OEM number, plug shape, pin count, mounting-hole distance, heat-sink style, and AC/DC charging-system type. This is especially important for Yamaha Big Bear models because similar model names can use different parts by year or trim.
What models or situations does this part not fit?
Do not order this voltage regulator rectifier for machines outside the listed compatibility, or for units with different pin counts, plug shapes, AC/DC system types, or mounting-hole spacing. If your original part number does not cross-reference with 4KB-81960-02-00, 4KB-81960-01-00, 4KB-81960-00-00, 4KB-81960, treat the fitment as unconfirmed. Model years outside 1996–2001, 1996, 2001 should be verified separately. Do not rely only on the model name or engine size.
What should I check before ordering?
Before ordering, compare your original part with the photos and check the OEM number, plug shape, pin count, mounting-hole distance, heat-sink style, and AC/DC charging-system type. Confirm OEM/cross-reference number(s): 4KB-81960-02-00, 4KB-81960-01-00, 4KB-81960-00-00, 4KB-81960. Recheck listed specs such as Installation Hole Spacing: 72 mm / 2.83", Installation Hole Diameter: 6 mm / 0.23", 1 × Voltage Regulator Rectifier. If any connector, mounting point, size, or year detail is different, confirm fitment before installation.