Regulator Rectifier for Yamaha Virago 1981-1990
Regulator Rectifier for Yamaha Virago 1981-1990
SKU:RMS020-101453
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AC/DC Voltage Regulator Rectifier for Yamaha XV Virago
Yamaha Virago 500, 750 and 920, Vision 550 and Radian 600, 1981-1990 - OEM 4X7-81960-A0-00
A brand new aftermarket AC/DC voltage regulator rectifier serving as a direct replacement for the original unit fitted to the early eighties Yamaha air-cooled range. It is a plug-and-play item with no assembly required, so it mounts on the standard 68 mm hole centres and reconnects through the same seven-pin arrangement across two plugs. The unit rectifies the alternator output to DC and regulates the charging voltage, which on machines of this age is very often the component holding back an otherwise sound electrical system.
A higher grade of electric components is used and the quality exceeds the OEM equipment, which matters on parts that have been out of production for decades and are usually replaced with something already tired. All shipped products are tested. The package also includes an additional connector for the main harness side, addressing the melted, corroded or defective plugs that cause repetitive electrical faults on bikes of this vintage. The part reference is RMS020-101453.
Key Features
- Brand new aftermarket AC/DC voltage regulator rectifier
- Direct replacement to your original unit
- Plug-and-play installation, no assembly required
- Higher grade of electric components
- Quality exceeds the OEM equipment
- Additional connector for the main harness side included
- All shipped products are tested
Technical Specs
| Specification | Detail |
|---|---|
| Part number | RMS020-101453 |
| Width | 90 mm |
| Length | 80 mm |
| Height | 28 mm |
| Wire length, 4 pin side | 380 mm |
| Wire length, 3 pin side | 130 mm |
| Fixation holes, centre to centre | 68 mm |
| Number of plugs | 2 |
| Number of pins | 7 |
| Number of wires | 7 |
| Minimum charging voltage | 14.5 V +/- 0.5 V |
| Maximum charging current | 50 A / 500 W |
| Open circuit voltage | Less than 15 V |
| Operation temperature | Minus 20 to 85 degrees Celsius |
Vehicle Fitment Guide
Years shown are the overall coverage span for this part. Please confirm against the OEM part number on your original unit before ordering.
| Make & Model | Years |
|---|---|
| Yamaha XV Virago 500 | 1981-1990 |
| Yamaha XV Virago 750 | 1981-1990 |
| Yamaha XV Virago 920 | 1981-1990 |
| Yamaha Vision 550 | 1981-1990 |
| Yamaha Radian 600 | 1981-1990 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number | Manufacturer / Brand |
|---|---|
| 3LT-81960-00-00 | Yamaha |
| 4X7-81960-A0-00 | Yamaha |
Frequently Asked Questions
Will it fit without modification?
Yes. It is a plug-and-play replacement with no assembly required, using the original 68 mm mounting centres and the same seven wires across two plugs.
What comes with it?
The regulator rectifier and an additional connector for the main harness side, so the plug on the bike can be renewed at the same time rather than reusing one that has already been cooked.
How do I tell whether the old regulator has failed?
Check the battery voltage with the engine running. Anything under 14.5 V means the system is not charging properly, and anything over 15 V means the regulator has lost control and is boiling the battery. On these models a failed rectifier can also let AC through, which shows up as erratic lighting and instruments. Blackened casing or a melted connector are further signs.
What does the AC/DC designation mean here?
The unit performs both jobs in one housing: it rectifies the alternator AC output into DC for the battery and electrical system, and it regulates that output so voltage stays within limits as engine speed changes. This is why it carries seven wires rather than the smaller counts found on later, simpler units.
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