Regulator Rectifier for Honda Goldwing Aspencade and Interstate 1975-1987
Regulator Rectifier for Honda Goldwing Aspencade and Interstate 1975-1987
SKU:RM30403
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Voltage Regulator Rectifier 50A - RM30403
Honda GL 1100 Goldwing and GL 1200 Goldwing Aspencade - 1975-1987
The RM30403 is a brand new voltage regulator rectifier for the classic Honda Goldwing, covering the GL 1100 and the GL 1200 Aspencade built between 1975 and 1987. It is a direct replacement for the original unit - plug-and-play, direct fit and easy to install, with no assembly required. The quality exceeds the OEM equipment and a higher grade of electrical component is used throughout. Every unit is tested before it ships.
A touring Goldwing places a heavy and constant load on its charging system, and the regulator rectifier is the part that has to cope with it: converting the stator output to direct current and then holding the charge voltage steady whatever the engine is doing. This unit is rated at a maximum charging current of 50 A / 500 W, a minimum charging voltage of 14.5 V plus or minus 0.5 V, an open circuit voltage below 15 V, and an operating range of -20 C to 85 C. It measures 80 mm wide by 104 mm long by 34 mm high, mounts on 78 mm hole centres, and carries a single plug with eight pins across eight wires of 220 mm. RMSTATOR also include the opposite connector for the main harness side, because on machines of this age those plugs are very often melted, corroded or defective and are a major cause of repeat electrical problems.
Key Features
- Brand new unit, a direct replacement for the original
- Plug-and-play, direct fit, easy installation with no assembly required
- Quality that exceeds the OEM equipment
- Higher grade electrical components throughout
- Maximum charging current of 50 A / 500 W
- Minimum charging voltage of 14.5 V +/- 0.5 V
- Open circuit voltage held below 15 V
- Single plug with eight pins across eight 220 mm wires
- Opposite connector for the main harness side supplied with the unit
- Every unit is tested before shipping
Technical Specs
| Specification | Detail |
|---|---|
| Part number | RM30403 |
| Width | 80 mm |
| Length | 104 mm |
| Height | 34 mm |
| Wire length | 220 mm |
| Fixation holes, centre to centre | 78 mm |
| Number of plugs | 1 |
| Number of pins | 8 |
| Number of wires | 8 |
| Minimum charging voltage | 14.5 V +/- 0.5 V |
| Maximum charging current | 50 A / 500 W |
| Open circuit voltage | Below 15 V |
| Operating temperature | -20 C to 85 C |
Vehicle Fitment Guide
The years shown are the overall model year span served by this regulator. Please confirm your own machine against the OEM part number cross reference below before ordering.
| Make & Model | Years |
|---|---|
| Honda GL 1100 Goldwing | 1975-1987 |
| Honda GL 1200 Goldwing Aspencade | 1975-1987 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number | Manufacturer / Brand |
|---|---|
| 31600-463-008 | Honda |
| 31600-MG9-000 | Honda |
| 31600-MG9-010 | Honda |
| 31700-371-000 | Honda |
Frequently Asked Questions
Does this fit without modification?
Yes. It is a plug-and-play, direct fit replacement for the original with no assembly required. The unit mounts on 78 mm hole centres and uses a single eight-pin plug on eight 220 mm wires, so those details let you confirm the match against the part currently fitted.
What is included?
The voltage regulator rectifier plus the opposite connector for the main harness side. RMSTATOR supply that second connector because the harness plug on a bike of this age is frequently melted, corroded or defective, and refitting a damaged plug is one of the most common reasons a charging fault returns soon after a new regulator goes on.
How do I know my old regulator has failed?
With the engine running, measure across the battery terminals. A working charging system should reach a minimum charging voltage of 14.5 V plus or minus 0.5 V and stay below roughly 15 V. If the voltage does not rise above resting battery level the unit has stopped charging; if it climbs well past 15 V the regulation has failed and the battery will be cooked. Burnt connector pins and a regulator body that gets extremely hot are further indicators.
Is 50 A enough for a fully loaded touring Goldwing?
The RM30403 is rated at 50 A / 500 W maximum charging current, which is the specification for this application. It is built with a higher grade of electrical component than the OEM unit it replaces and every unit is tested before dispatch.
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