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Common-Motor Combo Regulator Rectifier

Common-Motor Combo Regulator Rectifier


Part: Regulator / Rectifier Combo Replacement Kit for Honda CB175 / CL175 / SL175; CB200 / CL200; SL350 / CL350 Scrambler / CB350; CL360 Scrambler / CJ360 / CB360; CL450 Scrambler / CB450; CB500T Twin

Replaces OEM Part:31400-292-670, 31700-455-671, 31700-292-008, 31400-292-670, 31700-358-305

Why You Need This: The charging systems on all the old CL and CB Honda twins are weak at best. The factory voltage regulator (limits total voltage to the battery ) and rectifier (converts AC to DC) were barely up to the task back in the day. Add 40 years of heat, weather and previous owners wiring hacks and no wonder the battery on your bike is always dead. Well, we put our heads together and made a easy to install and affordable Honda replacement regulator / rectifier combo kit. This modern Honda CB350, CB360, CB450, CB500T regulator / rectifier combo is a single unit that replaces both factory parts. This is the single best electrical upgrade you can do to your Honda next to a halogen H4 headlight.

Installation Tip: This unit replaces both the factory regulator and rectifier. Depending on the bike you are working on, the new regulator rectifier can be mounted to the original voltage regulator bracket by elongating the holes with a round file. The original regulator and rectifier can be unplugged from the wiring harness and the new one simply connected. If your bike has the round style connection plug (many CB450's) then the old plug on the harness must be cut off and the new connector included with the unit must be plugged in. We highly recommend soldering the new leads into the system rather than just crimping on the connectors. The sole black wire connects where the black wire from the voltage regulator was connected to the harness. Some early bikes do not have a voltage regulator - only a rectifier. If you're unsure if this unit will work with your battery check with us.

For more help watch the Common-Motor regulator/rectifier installation video: https://youtu.be/CjTnFcrb3Dg

To get the most out of your bike's electrical charging system see the Common-Motor tech article on the "White / Yellow Wire Stator Coil Modification".

Wiring Notes CB450 K0 models:

The CB450 K0 has the same set up as the later bikes but the wiring colors are different from the stator coil to the new regulator rectifier. Additionally these bikes did not have a voltage regulator.

  • Brown from stator - connect to Pink on rectifier
  • Yellow & Pink from stator, combine together - connect to Yellow on rectifier
  • 12V switched on positive - to black on rectifier (voltage regulator connection)

Honda CB/CL Regulator / Rectifier Kit Includes:

  • Regulator / Rectifier Unit
  • Square Plug Connector (use as needed)
This Regulator Rectifier Fits These Honda Motorcycles
1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977
175 CB175K0 CB175K3 CB175K4 CB175K5 CB175K6 CB175K7
CL175K0 CL175K3 CL175K4 CL175K5 CL175K6 CL175K7
SL175K0 SL175K1 SL175K1
200 CB200K0 CB200K0 CB200T CB200T
CB450K0 CB450K0 CB450K0 CB450K1 CB450K2 CB450K3 CB450K4 CB450K5 CB450K6 CB450K7 CB500T CB500T
CL450K0 CL450K1 CL450K2 CL450K3 CL450K4 CL450K5 CL450K5 CL450K6
350 CB350K0 CB350K1 CB350K2 CB350K3 CB350K4 CB350K5
CL350K0 CL350K1 CL350K2 CL350K3 CL350K4 CL350K5
SL350K0 SL350K0 SL350K1 SL350K2 SL350K2
360 CB360G CB360T CB360T
CL360K0 CL360K1 CJ360T CJ360T

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