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Honda XL125 XL125S CB125 CB125S 6 Pin Voltage Regulator Rectifier | Replaces 31600-437-971
Honda XL125 XL125S CB125 CB125S 6 Pin Voltage Regulator Rectifier | Replaces 31600-437-971
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Product Overview
Restore stable charging performance with this 6 pin voltage regulator rectifier, designed for selected Honda XL125, XL125S, CB125, and CB125S applications.
Built to replace OEM 31600-437-971, 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 high-quality replacement materials, this regulator rectifier is designed to provide stable voltage control, improve charging capability, and help protect the battery from overcharging. Its compact design and direct-fit layout make it a practical replacement for correctly matched Honda 125cc motorcycle applications.
Product Compatibility
| Brand | Model | Engine / HP / CC | Year Range | Notes |
|---|---|---|---|---|
| Honda | XL125 | 125cc | 1985 | Verify OEM number and connector style before purchase |
| Honda | XL125S | 125cc | 1985 | Verify OEM number and connector style before purchase |
| Honda | CB125 | 125cc | 1984–1985 | Verify OEM number and connector style before purchase |
| Honda | CB125S | 125cc | 1984–1985 | Verify OEM number and connector style before purchase |
OEM Cross Reference:
31600-437-971
Specifications
| Specification | Details |
|---|---|
| Part Type | Voltage Regulator Rectifier |
| Configuration | 6 Pin |
| Mounting Hole Distance | 6.3 mm / 0.25" |
| Length | 44.4 mm / 1.75" |
| Width | 33 mm / 1.3" |
| Wire Length | 170 mm / 6.7" |
| Fitment Method | Match by OEM number, connector style, and original part layout |
| Material | High-quality replacement construction |
| Function | Voltage regulation and rectification |
| Condition | 100% New Aftermarket |
Key Features
- 6 Pin Replacement Design – Built for selected Honda 125cc motorcycle charging systems
- Stable Voltage Regulation – Helps maintain reliable battery charging and electrical output
- Overcharge Protection – Helps reduce the risk of battery damage from excessive voltage
- Compact Direct-Fit Layout – Designed for straightforward replacement when the connector matches
- Durable Construction – Lightweight, anti-rust, colorfast, and built for long-term use
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
Package Includes
1 × 6 Pin Voltage Regulator Rectifier
Fitment Note
Please confirm your OEM part number, connector style, mounting layout, wire length, and original part appearance before ordering.
If you are unsure about compatibility, contact us with your model, year, 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 Honda 125cc motorcycle ready for daily riding.
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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 1984–1985, 1985, 1984. It is best matched to original part number(s) 31600-437-971. Key physical/spec details from the product data include 6 Pin, Mounting Hole Distance: 6.3 mm / 0.25", Length: 44.4 mm / 1.75". 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 31600-437-971 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 Honda XL125/XL125S/CB125/CB125S 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 31600-437-971, treat the fitment as unconfirmed. Model years outside 1984–1985, 1985, 1984 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): 31600-437-971. Recheck listed specs such as 6 Pin, Mounting Hole Distance: 6.3 mm / 0.25", Length: 44.4 mm / 1.75". If any connector, mounting point, size, or year detail is different, confirm fitment before installation.