SKU: 38931829034

6-WIRE REGULATOR-VOLTAGE FOR KAWASAKI FD731V ENGINE 21066-2085 21066-2081

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Description

6-WIRE REGULATOR-VOLTAGE FOR KAWASAKI FD731V ENGINE 21066-2085 21066-20816 Wire Voltage Regulator Rectifier Fit for Kawasaki 21066 2081, 21066 2085 Features: Direct replacement to your original unit. Perfect fit and ready to install. Always use a sealant to mount the cable gland joint. All products shipped are tested. Instruction is NOT included. Specifications: Condition: Aftermarket 100% Brand New Quanity: 1 PC Type: Regulator Rectifier Other specifications: Number of wires: 6 Number of plugs: 1 Number of pins: 6 Please

6-Wire Voltage Regulator Rectifier Fit for Kawasaki 21066-2081, 21066-2085

Features:
Direct replacement to your original unit.
Perfect fit and ready to install.
Always use a sealant to mount the cable gland joint.
All products shipped are tested.
Instruction is NOT included.

Specifications:
Condition: Aftermarket 100% Brand New
Quanity: 1 PC
Type: Regulator / Rectifier

Other specifications:
Number of wires: 6
Number of plugs: 1
Number of pins: 6

Please comfirm and compare the number of pins and plugs with the old part if the same before purchasing.

Replacement Part Number:
21066-2081
21066-2085

(Always compare part numbers to your parts schematics and cross reference appropriately.)
(This is NOT a genuine Part, OEM part numbers are included for product type identification and comparison only.)

Fits Make/Model:
Fit for Kawasaki FD731V-AS00
Fit for Kawasaki FD731V-AS01
Fit for Kawasaki FD731V-AS03
Fit for Kawasaki FD731V-AS04
Fit for Kawasaki FD731V-AS05
Fit for Kawasaki FD731V-AS06
Fit for Kawasaki FD731V-AS08
Fit for Kawasaki FD731V-BS00
Fit for Kawasaki FD731V-BS01
Fit for Kawasaki FD731V-BS03
Fit for Kawasaki FD731V-BS04
Fit for Kawasaki FD731V-BS05
Fit for Kawasaki FD731V-CS00
Fit for Kawasaki FD731V-CS01
Fit for Kawasaki FD731V-CS03
Fit for Kawasaki FD731V-CS04
Fit for Kawasaki FD731V-CS05
Fit for Kawasaki FD731V-DS00

(Compatibility Chart is for reference ONLY!!!)
(Please Compare with Your faulty unit and the image we provided to Decide Fitment)

Package includes:
1x 6-Wire Regulator

Note:
Signs that your regulator needs replacing:
Depending on the location of the regulator rectifier, the part can easily overheat. Other causes for a dead regulator rectifier center on the battery. Ground connections are important for good voltage, and if there is a faulty voltage, the regulator rectifier can run hot. Bad grounding, corroded battery connection and poor or loose battery connections will cause faulty voltage too.

There are generally two ways for the regulator rectifier to fail:
The first deals with diode burnout, resulting in battery drain. It is easy to assume that the issue is a bad battery because of symptoms such as dimming headlights and poor starts. Checking the voltage with a voltmeter versus relying on symptoms alone will prove highly beneficial. If the voltage drops below 13 volts, the motorcycle will begin to drain the battery and eventually the engine will stop. Check for bad connections and corrosion; these can also cause voltage issues.
The other failure type is shunt regulator burnout, where the regulator rectifier fails to control the voltage, resulting in battery overcharge. Again, a voltmeter will be useful for diagnosis. Though generally, readings above 17 volts mean the regulator rectifier is not converting the excess power correctly and all of that excess voltage may cause the headlights to become extremely bright and then blow.

The product on offer is an accessory or spare part and thus is not an original product of the vehicle manufacturer.
The name of the vehicle manufacturer is stated only as an indication of the determination of the product being offered as an accessory or spare part, to clarify, for which vehicle the product on offer fits.

Warranty:
Returns: Customers have the right to apply for a return within 60 days after the receipt of the product
24-Hour Expert Online: Solve your installation and product problems

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 38931829034

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Arlene F. Soukey
Massapequa, US
★★★★★ 5
Great fit
Size: 38W x 29L, Color: Black
Bought for a friend He loves them Fit well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
A
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AGO
San Leandro, US
★★★★★ 3
You get what you pay for.
I have 4 pairs of these pants. Originally, I gave them a five star review because the fit was perfect, they are comfortable, and looked nice. I have worn them several times and they seemed to be well made. However, I've changed my rating to three stars. I've washed 3 of the 4 pairs I bought. The black pair came out o.k.. The olive and grey pairs are not color fast. The olive pair faded considerably in the wash and has a definite brown tinge to it in the thighs and knees. The grey pair did not fade as much, but you can also see that brown tinge in the thighs and knees. I can still wear them as work pants, but I was disappointed. I have also noticed that the inside of the front pockets have excessive wear. The bottom line is that these pants do not cost much, but will probably not last long. Are they worth $30? Personally, I'd rather pay more and get better quality. I had put several other Goodthreads items on my wishlist, but now I'm rethinking that.
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Reviewed in the United States on March 31, 2020
D
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Diana López
Alexandria, US
★★★★★ 5
Good quality
They are nice
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Reviewed in the United States on June 1, 2026
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Amazon Customer
Houston, US
★★★★★ 5
Great Shoes
Size: 10, Color: Cognac
Love these shoes super comfortable and look great. Everyone asks me where I got them.
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Reviewed in the United States on May 20, 2026
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Amazon Customer
Waukegan, US
★★★★★ 5
Beautiful shoe but too narrow
Size: 10 Wide, Color: Navy Grainy Leather
Too narrow
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Reviewed in the United States on May 24, 2026

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