Product Overview
The 12V Voltage Regulator Rectifier is a high-quality aftermarket replacement for Honda ATVs and motorcycles suffering from charging system failures. If your battery keeps dying, headlights flicker, or you're measuring excessive voltage at the battery terminals, your regulator rectifier has likely failed. This component converts the AC output from your stator into stable DC voltage to charge the battery and power the electrical system. Compatible with a wide range of Honda TRX350, TRX400, TRX450, and VT750 models, this plug-and-play unit restores proper charging performance without any wiring modifications.
Compatibility
Model
Years
OEM Part Numbers
Honda TRX350 FourTrax Rancher
2000–2006
31600-HM7-003
Honda TRX400 FourTrax Foreman
1995–2004
31600-HM7-003, 31600-HN0-671
Honda TRX450ES FourTrax Foreman
1998–2004
31600-HM7-830, 31600-HN5-M40
Honda TRX450R
2004–2009
31600-KTB-003
Honda TRX450S
2004–2009
31600-HM7-003
Honda VT750 Shadow
1998–2007
31600-KPF-961
Replaces OEM Part Numbers: 31600-HM7-003, 31600-HM7-830, 31600-HN0-671, 31600-HN5-M40, 31600-KPF-961, 31600-KTB-003
Specifications
Specification
Detail
Part Number (SKU)
FJ-VRR01
Voltage
12V DC Output
Dimensions
86mm × 83mm × 25mm (3-7/16" × 3-1/4" × 1")
Cooling
Heat Sink Fin Design
Connector Style
Factory Plug Compatible
Installation
Plug-and-Play, Direct Bolt-On
Warranty
60-Day Satisfaction Guarantee
Key Features
Wide Vehicle Compatibility: One regulator covers dozens of Honda models, including TRX350 Rancher, TRX400 Foreman, TRX450ES/S/R, and VT750 Shadow motorcycles. Replaces six different OEM part numbers — no need to sort through multiple SKUs.
Optimized Heat Dissipation: The integrated heat sink fin design rapidly dissipates thermal energy generated during voltage regulation, preventing overheating and ensuring long-term reliability even during extended rides or heavy electrical loads.
Stable 12V Output: Precisely regulates charging voltage to protect your battery from overcharging while delivering consistent current to run lights, ignition, and accessories simultaneously.
True Plug-and-Play: The electrical connector matches the factory wiring harness exactly — no cutting, splicing, or crimping required. Unplug the old unit, bolt in the new one, and you're ready to ride.
Prevents Electrical Damage: A faulty regulator can send unregulated voltage spikes through your entire electrical system, damaging ECUs, lighting, and batteries. Replacing a failing unit promptly prevents costly cascading failures.
Quality-Controlled Manufacturing: Each regulator undergoes electrical load testing and output verification before leaving the factory, ensuring it meets the specified voltage range out of the box.
Why Choose iFJF
iFJF understands powersports enthusiasts need parts they can trust when they're miles from home. Our voltage regulator rectifiers are manufactured using the same circuit design principles as the OEM units, with enhanced heat sink engineering for improved durability. Every unit is individually tested for output stability across the full RPM range. Whether you're trail riding, plowing snow, or commuting, an iFJF regulator rectifier gets your Honda's charging system back to peak performance. Backed by our 60-day warranty and responsive customer support team.
FAQ
Q: How do I know if my regulator rectifier is bad?
A: Key symptoms include: battery not charging or constantly draining, headlights dimming or flickering at different RPMs, battery voltage reading above 15V (overcharging) or below 13V (undercharging) while running, burned-out bulbs, or a battery that's boiling/hot to the touch. Use a multimeter — a healthy system should read 13.5V-14.5V at the battery with the engine running.
Q: Will this fit my Honda TRX350 Rancher?
A: Yes, this regulator rectifier fits 2000-2006 Honda TRX350 FourTrax Rancher models (both 2WD and 4WD). It replaces OEM part 31600-HM7-003. The connector and mounting points are direct fit.
Q: Is installation difficult?
A: Not at all. The regulator is typically mounted under the seat or on the frame near the battery. Unbolt the old unit, unplug the connector, bolt in the new one, and plug it in. Most riders complete the swap in 15-20 minutes using basic hand tools. No special electrical knowledge is needed.
Q: Does this come with mounting hardware?
A: The regulator itself includes the standard mounting holes that match the factory bolt pattern. You'll reuse your existing mounting bolts. If your original bolts are corroded or missing, standard M6 bolts from any hardware store will work.
Q: Can a bad regulator rectifier drain my battery?
A: Yes — a failed regulator rectifier can drain your battery in two ways. If the internal diodes short out, current can flow backward from the battery through the stator when the engine is off, draining the battery overnight. If the regulator fails to charge while running, your battery simply never gets recharged. Either way, replacing the regulator rectifier is the fix.
Explore Related Products
Complete your Honda charging system refresh with our Powersports Electrical Collection, featuring stators, starter solenoids, CDI boxes, and ignition coils for ATVs and motorcycles. Also check our Honda ATV Parts Collection for complete model-specific repair solutions.
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