GOOFIT
Voltage Regulator Rectifier for Honda CB750, CB900, CB1000, CB1100F & CBX1000
Voltage Regulator Rectifier for Honda CB750, CB900, CB1000, CB1100F & CBX1000
5.0 / 5.0
(2) 2 total reviews
Couldn't load pickup availability
Product Overview
Restore reliable charging performance to your classic Honda motorcycle.
This heavy-duty voltage regulator rectifier is specifically engineered for vintage Honda DOHC inline-four engines, delivering stable 12V DC output to protect your battery, ignition system, and electrical components.
Designed to solve common overheating and charging failures found in older OEM units, it ensures consistent performance whether you're restoring a classic bike or riding it daily.
Product Compatibility
| Model | Engine | Year |
|---|---|---|
| Honda CB750K / CB750F / CB750C | 748cc | 1979–1982 |
| Honda CB750SC Nighthawk | 748cc | 1982–1983 |
| Honda CB750L LTD | 748cc | 1979 |
| Honda CB900C / CB900F | 901cc | 1980–1982 |
| Honda CB1000C Custom | 998cc | 1983 |
| Honda CB1100F Super Sport | 1062cc | 1983 |
| Honda CB650SC Nighthawk | 627cc | 1983–1985 |
| Honda CB700SC Nighthawk | 696cc | 1984–1986 |
| Honda CBX1000 | 1047cc | 1979–1982 |
Replace Part Numbers
Compatible OEM Replacement Numbers:
31600-MG5-000
31600-MA6-910
31600-MA7-008
31600-MA6-000
31600-MA2-008
31600-422-008
31600-425-008
31600-461-771
31600-469-008
Technical Specifications
| Specification | Details |
|---|---|
| Voltage | 12V DC |
| Fitment Type | Direct Replacement |
| Material | Heat-conductive alloy housing |
| Cooling | Passive heat dissipation design |
| Function | Voltage regulation & rectification |
Product Features
- Stable 12V Charging Output – Eliminates battery drain and weak starting issues
- Heavy-Duty Heat Dissipation – Prevents regulator burnout common in vintage systems
- Wide OEM Compatibility – Covers multiple Honda DOHC part numbers
- Plug & Play Installation – Direct fit with factory wiring harness
- Built for Classic Bikes – Optimized for carbureted and early ignition systems
Share
Fitment FAQ
Will this part fit my specific model and year?
This voltage regulator rectifier is intended for Engine; Honda CB750K / CB750F / CB750C; 748cc; 1979–1982; Honda CB750SC Nighthawk; 1982–1983. It is best matched to original part number(s) 31600-MG5-000, 31600-MA6-910, 31600-MA7-008, 31600-MA6-000. Key physical/spec details from the product data include Voltage: 12V DC, 12V, 748cc. Use the compatibility table and product photos together before ordering.
Do I need to match the OEM part number?
Yes. Match your original part number to 31600-MG5-000, 31600-MA6-910, 31600-MA7-008, 31600-MA6-000 before purchase. For this voltage regulator rectifier, also compare the OEM number, plug shape, pin count, mounting-hole distance, heat-sink style, and AC/DC charging-system type. This is especially important for Honda CB750/CB900/CB1000/CB1100F models because similar model names can use different parts by year or trim.
What models or situations does this part not fit?
Do not order this voltage regulator rectifier for machines outside the listed compatibility, or for units with different pin counts, plug shapes, AC/DC system types, or mounting-hole spacing. If your original part number does not cross-reference with 31600-MG5-000, 31600-MA6-910, 31600-MA7-008, 31600-MA6-000, treat the fitment as unconfirmed. Model years outside 1979–1982, 1982–1983, 1980–1982, 1983–1985, 1984–1986 should be verified separately. Do not rely only on the model name or engine size.
What should I check before ordering?
Before ordering, compare your original part with the photos and check the OEM number, plug shape, pin count, mounting-hole distance, heat-sink style, and AC/DC charging-system type. Confirm OEM/cross-reference number(s): 31600-MG5-000, 31600-MA6-910, 31600-MA7-008, 31600-MA6-000. Recheck listed specs such as Voltage: 12V DC, 12V, 748cc. If any connector, mounting point, size, or year detail is different, confirm fitment before installation.
I got this rectifier for a homemade project on a motorcycle that I'm creating and the rectifier is working perfectly well so far.
I got this for aCB750 Nighthawk.
I haven't gone on any rides, it's been Canadian winter the whole time, but on the bench so far it's worked out.
The Nighthawks had famously bad electrical systems with their generators not even maintaining the battery at idle. They're fine on the highway, but, if they're not purring they're slowing down. Hence me replacing the whole charging system.
The heatsink looks adequate to me, the wiring is good, the connectors are well-assembled. No quality issues that I can identify.
Car parts to me are either 5-star or 1-star. It either works perfectly, or, if it's less than perfect, no one should buy it and it's a frustrating waste of time. I might drop it to 4-stars if the price was too high, but other than that, those are the possible options. This is perfect so far, but I only have a few minutes of runtime on it. The real test will be if it lasts a season. Presume that no news is good news, I'll be more incentivized to drop my rating for a bad product and to warn others than to come back and re-confirm a good product later.
So far so good. So it has a tentative 5-star.