This is a brand new aftermarket voltage regulator rectifier, a direct replacement for the original unit fitted to the Kawasaki W 650 and the VN Vulcan 1500 and 1600 cruisers. The rectifier stage converts the alternating current produced by the stator into the direct current the battery and electrical system require, and the regulator stage holds that output at a controlled level so the battery charges fully without being overcharged. Fitting is plug and play, a direct fit with easy installation and no assembly required.
The unit measures 103 mm long by 80 mm wide by 32 mm high, with 77 mm between the fixation holes and 480 mm of wire. It uses a single plug with five pins and seven wires, and is rated to a maximum charging current of 50 A or 500 W. The quality exceeds the OEM equipment, with an improved heat sink, better charging capability and a higher grade of electric components than the original. All products shipped are tested. Part reference RM30202.
Key Features
- Brand new aftermarket unit, direct replacement to your original
- Plug and play, direct fit, easy installation, no assembly required
- Higher grade of electric components
- Improved heat sink and charging capabilities
- Quality exceeds the OEM equipment
- Rated to 50 A / 500 W maximum charging current
- All products shipped are tested
Technical Specs
| Specification |
Detail |
| Width |
80 mm |
| Length |
103 mm |
| Height |
32 mm |
| Wires length |
480 mm |
| Distance between fixation holes |
77 mm |
| Number of plugs |
1 |
| Number of pins |
5 |
| Number of wires |
7 |
| Minimum charging voltage |
14.5 V +/- 0.5 V |
| Maximum charging current |
50 A / 500 W |
| Open circuit voltage |
Under 15 V |
| Operation 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 |
| Kawasaki W 650 |
1996-2008 |
| Kawasaki VN Vulcan 1500 |
1996-2008 |
| Kawasaki VN Vulcan 1600 |
1996-2008 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 21066-1106 |
Kawasaki |
Frequently Asked Questions
Will this fit without modification?
Yes. It is a direct fit, plug and play replacement using the original mounting points at 77 mm spacing, with the single factory plug carrying five pins and seven wires. No assembly and no wiring changes are needed.
What is included?
One brand new aftermarket voltage regulator rectifier, part reference RM30202, tested before shipping.
How do I know my old regulator rectifier has failed?
With the engine running, the battery should read close to 14.5 V. If the voltage never rises above resting battery level the unit is not charging; if it climbs past 15 V it is overcharging, which boils the battery and shortens bulb life. Vulcan owners commonly see repeated flat batteries, lights that brighten and dim with the throttle, and a regulator body that runs extremely hot or looks scorched.
How do I check the connections match my bike?
This unit uses one plug with five pins and seven wires in total, and the mounting holes sit 77 mm apart. Compare those figures and the OEM number 21066-1106 with your existing unit before ordering.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
