This is a brand new aftermarket voltage regulator rectifier built as a direct replacement for the original unit fitted to the Honda XR 250 R from 1990 to 2004. It is a plug-and-play, direct fit part: it mounts in the factory position and connects through the same 4-pin plug, so installation is straightforward and no assembly is required before fitting.
The unit uses a higher grade of electrical components than the original, and the manufacturer states that the quality exceeds the OEM equipment it replaces. Every regulator is tested before it is shipped. The regulator measures 39 mm x 56 mm x 24 mm with a 75 mm wire tail, and holds the charging system at a minimum of 14.5 V +/- 0.5 V with a maximum charging capacity of 50 A / 500 W.
Key Features
- Direct replacement for the original unit - plug-and-play, direct fit, easy installation
- No assembly required before fitting
- Higher grade of electrical components; quality exceeds the OEM equipment
- Every unit is tested before shipment
- 4 wires, 4 pins and 4 plugs, with a 75 mm wire length
- Rated to 50 A / 500 W maximum charging current
- Sealed for an operating range of -20 C to 85 C
Technical Specs
| Specification |
Detail |
| Part number |
RMS020-101819 |
| Width |
39 mm |
| Length |
56 mm |
| Height |
24 mm |
| Wires length |
75 mm |
| Number of plugs |
4 |
| Number of pins |
4 |
| Number of wires |
4 |
| Minimum charging voltage |
14.5 V +/- 0.5 V |
| Maximum charging current |
50 A / 500 W |
| Open circuit voltage |
15 V |
| Operating temperature |
-20 C to 85 C |
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 |
| Honda XR 250 R |
1990-2004 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 31410-KZ1-670 |
Honda |
Frequently Asked Questions
Does this need any modification to fit?
No. It is a direct replacement for the original unit - plug-and-play, direct fit and easy to install. There is no assembly required and the 4-pin plug matches the factory connector.
What is included?
One brand new voltage regulator rectifier, tested before shipment. No additional hardware is listed for this part number.
How do I know the old regulator has failed?
With the engine running, the charging system should show at least 14.5 V +/- 0.5 V at the battery. A flat or boiling battery, lights that dim or flare with engine speed, or a scorched regulator body or melted connector are the usual signs the unit has failed.
How do I confirm this is the right part for my XR 250 R?
Check the number moulded or stamped on your existing regulator. If it reads 31410-KZ1-670, this unit is the correct replacement. The dimensions above (39 mm x 56 mm x 24 mm) also give a quick physical check against the part you are removing.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
