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Voltage Regulator Rectifier for Honda XL600V XL400V Transalp 31600-MM9-000
Voltage Regulator Rectifier for Honda XL600V XL400V Transalp 31600-MM9-000
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Product Overview
Replace a damaged, overheated, or unstable voltage regulator rectifier with this 12V replacement unit, designed for select Honda XL600V Transalp 600, XL400V Transalp 400, and related adventure motorcycle applications using OEM reference numbers 31600-MM9-000 and 31600-MS6-921.
The voltage regulator rectifier is an important part of the motorcycle charging system. It helps regulate charging voltage before power reaches the battery and electrical components. A faulty regulator rectifier may cause weak charging, battery overcharging, repeated battery failure, dim lights, blown bulbs, unstable voltage, melted connectors, or charging system problems.
This replacement unit is designed for a standard 12V DC charging system and supports stable voltage output between 13.5V and 14.5V based on supplied product data. Please compare your original regulator rectifier’s OEM number, plug shape, wire layout, mounting hole spacing, body size, and overall appearance before ordering.
Product Compatibility
| Make | Model | Year Range | OEM / Reference Number | Fitment Notes |
|---|---|---|---|---|
| Honda | XL600V Transalp 600 / PD06 | 1987–1999 | 31600-MM9-000 / 31600-MS6-921 | Main fitment; confirm original regulator and connector layout |
| Honda | XLV600 / XL600 Transalp 600 | 1987–1999 | 31600-MM9-000 / 31600-MS6-921 | Model-name variation used on some listings; verify original part |
| Honda | XL400V Transalp 400 | 1992–1994 | 31600-MM9-000 / 31600-MS6-921 | Common related fitment; compare plug and mounting points |
| Honda | XLV400 Transalp 400 | 1992–1994 | 31600-MM9-000 / 31600-MS6-921 | Model-name variation; match by OEM and connector |
| Honda | XRV650 Africa Twin / RD03 | 1988–1989 | Verify original part | Possible related fitment only if OEM number, plug, and size match |
Important Fitment Note:
This part is not selected by model name alone. Honda XL600V, XL400V, XLV400, XLV600, Transalp, and XRV650 models may use different regulator rectifiers depending on market, year, wiring harness, connector design, and charging system setup. Please confirm your original regulator rectifier matches OEM 31600-MM9-000 or 31600-MS6-921, the plug shape, wiring layout, 68mm mounting hole spacing, and body design before ordering.
Specifications
| Specification | Details |
| Product Type | Voltage Regulator Rectifier |
| Compatible Brand | Honda |
| Main Compatible Models | XL600V Transalp 600, XL400V Transalp 400 |
| Possible Related Model | XRV650 Africa Twin, verify before purchase |
| Voltage System | Standard 12V DC System |
| Stable Voltage Output | 13.5V–14.5V |
| Mounting Hole Spacing | 68mm / 2.67" |
| Main OEM References | 31600-MM9-000 / 31600-MS6-921 |
| Application | Motorcycle Charging System |
| Fitment Type | Replacement, match by OEM number, connector, and size |
| Material / Build | Heat-resistant, vibration-resistant, and wear-resistant housing, based on supplied product data |
Key Features
- 12V voltage regulator rectifier for select Honda Transalp motorcycle charging systems
- Designed for matching XL600V Transalp 600 and XL400V Transalp 400 applications
- Replaces Honda regulator rectifier references 31600-MM9-000 and 31600-MS6-921
- Helps regulate charging voltage for stable electrical output
- Helps reduce weak charging, overcharging, dim lights, battery drain, and repeated battery failure
- Heat-resistant and vibration-resistant construction supports stable operation
- Direct replacement style, but original OEM number, plug shape, wiring layout, and mounting distance must be checked before installation
OEM Cross Reference
| OEM / Reference Number | Notes |
| 31600-MM9-000 | Main Honda regulator rectifier reference |
| 31600MM9000 | Compact format of 31600-MM9-000 |
| 31600-MS6-921 | Main Honda regulator rectifier reference |
| 31600MS6921 | Compact format of 31600-MS6-921 |
Please use the OEM/reference number together with physical dimensions and connector layout for fitment confirmation. If your original regulator rectifier has a different plug shape, different wire layout, different mounting hole distance, different body size, or different charging system design, this part may not fit.
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Preguntas frecuentes sobre compatibilidad
¿Esta pieza es compatible con mi modelo y año específicos?
This regulator rectifier is designed for select Honda XL600V Transalp 600 and XL400V Transalp 400 applications using OEM references 31600-MM9-000 and 31600-MS6-921. It may also fit select XRV650 applications only when the original regulator matches. Please compare your original part number, plug shape, wire layout, body size, and mounting hole spacing before ordering.
¿Necesito que coincida el número de pieza OEM?
Yes, matching the OEM or reference number is strongly recommended. This regulator rectifier replaces Honda 31600-MM9-000 and 31600-MS6-921. However, OEM number alone is not enough. Please also confirm the connector shape, wiring layout, mounting hole spacing, body size, and charging system type.
¿Qué modelos o situaciones no son compatibles con esta pieza?
This part does not fit Honda Transalp, Africa Twin, Shadow, VFR, CB, CBR, XL, XRV, or other Honda motorcycles that use a different regulator body, different connector shape, different wiring layout, different mounting distance, or different charging system design. It is also not a replacement for the stator, battery, starter relay, fuse box, ignition coil, CDI / ECU, or complete wiring harness.
¿Qué debo verificar antes de hacer un pedido?
Before ordering, please check your motorcycle make, model, year, market version, original regulator part number, plug shape, wire layout, mounting hole spacing, body length, width, thickness, and charging system type. For best fitment, compare the product photos and specifications with your original regulator rectifier before purchase.