Regulator Rectifier For 2001-2006 Honda CBR600F4i : 31600-MBW-D21

Regulator Rectifier for Honda CBR600F4i

This regulator rectifier replaces the failed charging component on 2001 through 2006 Honda CBR600F4i motorcycles, converting stator AC output to regulated DC voltage that keeps the battery charged; it carries the OEM cross-reference 31600-MBW-D21.

Overview

This regulator rectifier is a direct-fit charging system component for the Honda CBR600F4i, converting stator AC current into stable DC voltage for the battery and electrical system. It restores charging output when the original unit has burned out or stopped regulating properly. Riders and independent shops use this regulator rectifier to bring a CBR600F4i back to reliable running condition.

Built For Performance

• Solid-state circuitry regulates voltage across the full RPM range
• Sealed housing resists moisture and road grime
• Direct replacement for the OEM 31600-MBW-D21 unit
• Connector layout matches the factory harness for a plug-in installation
• Cooling body design helps dissipate heat under sustained load

Fits These Machines

• for Honda CBR600F4i 2001
• for Honda CBR600F4i 2002
• for Honda CBR600F4i 2003
• for Honda CBR600F4i 2004
• for Honda CBR600F4i 2005
• for Honda CBR600F4i 2006

On-The-Job Use

• Restoring charging output on a CBR600F4i with a failed regulator
• Routine replacement during battery or stator service
• Track and street bike electrical upkeep
• Shop repairs where a no-charge condition traces to the rectifier

Specs At A Glance

Good To Know

Q: Can a bad regulator rectifier drain the battery? A: Yes, a failed unit often stops charging the battery or allows overcharging, which shortens battery life. Replacing it restores normal charge voltage.

Q: Should I check the stator first? A: It is worth testing the stator output before ordering, since a weak stator can mimic regulator symptoms. Confirm the regulator is the fault so the repair is done once.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.