This is a genuine OEM Honda voltage regulator/rectifier unit manufactured by Stanley, casting number HA20. It converts AC power from the stator into stable DC power for battery charging while helping control excess voltage in the motorcycle electrical system. Built with a finned aluminum heat-sink body, the unit is designed for efficient heat dissipation. It includes hard-wired pigtail leads with bullet-style connectors for connection to the factory wiring harness. Vehicle Compatibility List Honda OEM Part Number: 31600-428-631 Superseded Part Number: 31600-437-731 * Honda XLS125 / XLS 125cc (1980-1981) * Honda XL125S (1980-1981) * Honda XL250S (1980) * Honda XL500S (1980-1981)
Please verify compatibility with your specific motorcycle model before purchasing.
Cleaning Status
partially_cleaned
Cleaning Notes
Used anti rust
Worldwide shipping available
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Estimated delivery: 2-5 business days
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Items can be insured — contact us for more information
30-day return policy on most items
Items must be in original condition and packaging
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Yes, all parts with OEM numbers are genuine manufacturer parts. Check the specifications tab for the OEM number.
We offer a 30-day return policy. Items must be in original condition. See the Shipping tab for complete details.
Yes, we ship to most countries worldwide. Shipping costs and delivery times vary by location.
Parts are sold separately. We recommend professional installation for safety and warranty purposes.
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