Brand new aftermarket voltage regulator rectifier supplied as a direct replacement for your original unit on the Yamaha Trailway TW 200, Razz 50, Jog 50 and Zuma CW II 50. Installation is plug-and-play with direct fit compatibility, so the factory mounting position and the original connector are used without alteration.
This is a compact unit at 55 mm wide, 42 mm long and 22 mm high, with a single plug carrying 4 pins. It is built with higher-grade electrical components whose quality exceeds OEM equipment, and all products undergo testing before shipment. Correct regulation matters on these small-capacity machines because an unregulated charging output will cook a battery and blow bulbs in short order.
Key Features
- Direct replacement for the original unit
- Plug-and-play, direct fit compatibility
- Compact 55 x 42 x 22 mm body
- Single 4-pin plug matching the factory connector
- Higher-grade electrical components exceeding OEM equipment quality
- Minimum charging voltage of 14.5 V +/- 0.5 V
- Rated to a maximum charging current of 50 A / 500 W
- All products tested before shipment
Technical Specs
| Specification |
Detail |
| Part number |
RMS020-102862 |
| Width |
55 mm |
| Length |
42 mm |
| Height |
22 mm |
| Number of plugs |
1 |
| Number of pins |
4 |
| Minimum charging voltage |
14.5 V +/- 0.5 V |
| Maximum charging current |
50 A / 500 W |
| Open circuit voltage |
< 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 |
| Yamaha Trailway TW 200 |
1987-1994 |
| Yamaha Razz 50 |
1987-1994 |
| Yamaha Jog 50 |
1987-1994 |
| Yamaha Zuma CW II 50 |
1987-1994 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 2JA-81960-A0-00 |
Yamaha |
| 2JA-81960-A1-00 |
Yamaha |
| 2JA-81960-90-00 |
Yamaha |
| 1KH-81960-00-00 |
Yamaha |
Frequently Asked Questions
Will it fit without modification?
Yes. It is a direct fit with plug-and-play installation. The single 4-pin plug matches the original connector and the compact 55 x 42 x 22 mm body sits in the standard location, so no cutting or splicing is required.
What is included in the box?
The voltage regulator rectifier unit, tested before shipment.
How do I know the old unit has failed?
Typical symptoms are a battery that will not hold charge, headlight and tail light bulbs that blow repeatedly, or lights that flare brightly as the revs rise. With the engine running, a working charging system should reach at least 14.5 V +/- 0.5 V at the battery. A reading that stays at resting voltage or climbs past 15 V points to the regulator rectifier.
Can one part really cover a TW 200 and a 50 cc scooter?
Yes. Yamaha used the same regulator rectifier design across these small-capacity models, which is why the OEM references 2JA-81960-A0-00, 2JA-81960-A1-00, 2JA-81960-90-00 and 1KH-81960-00-00 all point at the same unit. Match your original number against that list to be sure.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
