Regulator For Kawasaki ZR Zephyr 550 94-98 ER-5 Twister 500 97-05 21066-1098
Regulator For Kawasaki ZR Zephyr 550 94-98 ER-5 Twister 500 97-05 21066-1098
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Voltage Regulator Rectifier Fit for Kawasaki ER-5 ER 500 Twister ZR 550 Zephyr 1994-2005
Features:
Direct replacement to your original unit.
Plug-and-play, direct fit, easy installation.
No assembly required.
Higher grade of electric components.
Improved heat sink and charging capabilities.
The quality exceeds or meet the OEM equipment.
All products shipped are tested.
Specifications:
Condition: Aftermarket 100% Brand New
Quanity: 1 PC
Type: Voltage Regulator / Rectifier
other specifications:
Number of wire: 6
Number of plug: 1
Number of pin: 6
Replacement Part Number:
21066-1098
Fitment:
Fit for Kawasaki ZR400 Zephyr 1994-1995
Fit for Kawasaki ZR400 Zephyr X 1996-2008
Fit for Kawasaki ZR550 Zephyr 1994-1998
Fit for Kawasaki ER-5 ER500 Twister 1997-2005
(Compatibility Chart is for reference ONLY!!!)
(Please Compare with Your faulty unit and the image we provided to Decide Fitment)
Package Includes:
1x Voltage Regulator Rectifier
NOTE:
Before installing your new regulator rectifier;
Check the AC output of the stator.
Replace any burned or corroded connectors on stator and regulator/rectifier
Check and repair any melted wiring.
Use hi-temp dielectric grease on all connectors.
How to distinguish CDI box with AC fired or CDI box with DC fired?
If headlights turn on without the engine running(with just the key on), it is a DC system. In the AC system, turning headlights on require the engine to be running. Another indication is, if the engine will only runs with a battery it is DC. If it will runs without a battery, it is a AC system.
What does the voltage regulator do?
This regulator has the task of converting the alternating voltage (AC) generated by the alternator into the direct voltage (DC) 12V used in the vehicle electrical system and keeping the voltage within a certain range.
The voltage regulator is also responsible for ensuring that the battery is charged and that the light bulbs do not burn out.
How do I know if the charge regulator can be defective?
- Incandescent lamps burn out all the time.
- Headlights get brighter and darker.
- The battery is constantly empty.
Shipping:
Free Shipping
Handling?time: Ship within 24 hours
Delivery Time: 3-7 business days
Warranty:
1. Condition: 100% Brand New
2. Warranty Period: 1 Years
3. 24-Hour Support: Provide you with timely after-sale support
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I have to praise the logistics! I received the product soon after placing the order. It was extremely well - packaged with no bumps at all. The shopping experience was amazing!
So worth buying! The shipping was lightning - fast and the packaging was secure. This rectifier is of great quality with stable performance. I'll definitely repurchase!
So many satisfied customers rave about this voltage regulator rectifier! It must be great, and I can't wait to try it.
I'm impressed by the quality of this product. It's solidly built and seems very reliable. Exactly what I needed.
This Honda regulator rectifier is a great find. It works flawlessly and has been a reliable replacement for my bike.




Let customers speak for us
from 1347 reviews
Do its job well

Super high quality design and craftsmanship pricey but its worth it trust me

Perfectly fixed the issue of the horn sometimes not working and the warning light staying on all the time.

Beats paying for OEM carburetor

Perfect!

This seller is awesome—their stuff is top-notch. I bought 30 from them before, and only one didn’t work out. I tried another cheaper place and got 50, but at least 15 customers complained they were either useless or failure after a few days. Compared to that, this place is way better. You really get what you pay for. This time, I went all in and grabbed 100—should keep my shop stocked for about two months. Definitely coming back for more when I run out!

Showed up right on time, and the communication was on point the whole way through. 100% would buy again! The grill quality is seriously top-notch.
Highly recommend getting a body shop to install it—there are always little tweaks needed for a perfect fit, especially with the crash bar and sensors. In the UK, you can’t remove the poly padding on the crash bar, so keep that in mind.
Definitely ordering again—looks straight-up classy on the car!

Real solid quality, especially since I couldn’t find it anywhere else. Glad I got my hands on it!

Superb quality. Thanks

The carburetor fit great and started right up. Great buy.

Great carb !!!! Never let me down. Great service from champoo once again. First Class 👍

As good as OEM

My car basically just quit on me—totally stopped moving—and the codes were pointing to an O2 sensor failure. Thankfully, the upstream and downstream O2 sensors I ordered showed up super fast. I bought both just to be safe, but I only needed to swap out the upstream sensor right away (along with some new spark plugs and a MAF sensor I grabbed from another place). After the install, my car’s running smooth again, and that annoying check engine light hasn’t come back. I’ve bought a bunch of parts from 1A Auto before, and honestly, I’ve never had any issues with them. They’ve been solid every time.

My order arrived right on time, no delays at all. I got it installed the very next day, and let me tell you, it fit like a glove! Now I can see everything clearly behind me while I'm riding—no blind spots, no stress. Honestly, I couldn’t be happier with this purchase. It’s exactly what I needed, and it’s made driving so much smoother. Totally worth it!

Fit well and perform well