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SKU:
NLT1R00465
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Yamaha Big Bear 350 400 Regulator Rectifier for 1996–2001 YFM Models
$38.99
In Stock
$38.99
Sale price
$38.99
Regular price
Regulator-rectifier for compatible 1996–2001 Yamaha Big Bear 350 and Big Bear 400 YFM models with the matching plug, pinout, and mounting pattern.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- 1996–1999 Yamaha Big Bear 350 YFM350 models with the matching regulator
- 2000–2001 Yamaha Big Bear 400 YFM400 models with the matching regulator
- Compatible 1996–2001 Big Bear 350 or 400 2WD and 4WD versions only when plug and pinout match
Product Overview
Repeated dead batteries, blown bulbs, unstable lighting, or charging voltage outside specification can lead to the regulator-rectifier. A failing stator, sulfated battery, burnt connector, poor ground, or added accessories can produce the same complaint and should be tested before parts are swapped.
The unit rectifies stator AC into DC and limits voltage for the battery and electrical system. Yamaha changed connectors and charging components across YFM versions, so compare wire count, pin location, case, cooling fins, mounting holes, and the removed unit.
Key Features & Performance
- Controls charging output on matching Big Bear 350 and 400 systems
- Rectifies stator current for the 12-volt battery system
- Addresses verified overcharge, undercharge, or failed rectifier diodes
- Mounts in the original location when plug and case dimensions match
Common Uses
- Replacing a regulator that permits battery overcharging
- Correcting low DC charging after the stator passes testing
- Repairing a diode fault that causes unstable voltage
- Restoring charging after damaged wiring and grounds are repaired
Technical Specifications
- Product Type: Regulator Rectifier
- Electrical System: 12 V
- Vehicle Families: Yamaha Big Bear 350 and 400
- Application Years: 1996–2001 matching layouts
- Condition: New aftermarket
Installation & Fitment
- Load-test the battery and check stator AC output and insulation to ground
- Repair melted connectors, loose pins, and corroded engine or frame grounds
- Compare plug keying, pinout, wire count, heat sink, and bolt spacing
- Mount against the intended heat-transfer surface and verify voltage across the rpm range
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown.
Model, production date, serial number, electrical or fuel-system version, dimensions, installed options, and previous repairs can affect fitment. Compare the original part and application information before purchase.
Frequently Asked Questions
Q: Can a new regulator fix a weak stator? A: No. If stator AC output is low or a winding is shorted, the stator or its wiring needs repair.
Q: Why must the connector pinout match? A: Similar housings can place charging, ground, and sensing wires differently; a wrong connection can cause damage.
Q: How do I confirm fitment before ordering? A: Match the original reference number where available, then compare the removed part, dimensions, connections, mounting details, model, serial or production information, and package photos.
Q: Is this an original-equipment part? A: No. This is a new aftermarket part. Brand names and reference numbers are used only to identify compatible applications.
Part Summary
keywords: Yamaha Big Bear regulator rectifier, YFM350 charging repair, YFM400 voltage regulator, 1996 Big Bear dead battery, Yamaha ATV overcharging, Big Bear 400 rectifier
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.