Chopper Cache

Fitment, source notes & wire connections

1981 Kawasaki KZ400 Single-Phase Charging System

1981 · KZ400 · Single-phase charging / five-wire regulator-rectifier / switched sense

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Community reference trace · By Choppercache

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Diagram reference

An interactive KZ400 charging-system reference for the single-phase, five-wire regulator/rectifier configuration with a switched sense lead.

This diagram shows 5 components and 7 wire connections. The details below describe the saved diagram; they do not confirm compatibility with your machine.

Recorded fitment
1981 KZ400
Configuration
Single-phase charging / five-wire regulator-rectifier / switched sense
Circuits labeled in the diagram
Charging, Main, Grounds

Components shown

  • STAT · Single-Phase Stator

    Two AC stator leads

  • REG/REC · Single-Phase Regulator / Rectifier

    2 AC in / DC out / ground / switched sense

  • BAT · Battery

    Negative grounded to frame

  • GND · Ground

    Battery negative return

  • KEY · Key Switch

    Battery / accessory / ignition-on / spring start

Source notes

Community reference trace · Choppercache KZ400 community troubleshooting identifies two yellow stator leads, a ground, battery-positive output, and a brown switched-voltage sense/excite lead on the five-wire regulator/rectifier. Confirm the exact replacement-unit pinout before wiring. Recorded reference URLs: https://kzrider.com/forum/4-electrical/618050-rectifier-regulator-kz400-5-wires-vs-4-wires

Community reference trace · Choppercache

Publication note: KZ400 community troubleshooting identifies two yellow stator leads, a ground, battery-positive output, and a brown switched-voltage sense/excite lead on the five-wire regulator/rectifier. Confirm the exact replacement-unit pinout before wiring.

Limitations and checks

KZ400 community troubleshooting identifies two yellow stator leads, a ground, battery-positive output, and a brown switched-voltage sense/excite lead on the five-wire regulator/rectifier. Confirm the exact replacement-unit pinout before wiring. These recorded references do not establish that this circuit has been tested on your motorcycle. Match the installed components, polarity, terminal pinouts, wire sizes, and circuit protection to the relevant service documentation before applying power.

Verify your hardware pinouts, polarity, wire sizes, and component ratings before applying power.

Wire connections (7)
Wire connections recorded in this diagram
FromToGaugeColor
BAT · B−GND · GND6 AWGBlack / frame ground
BAT · B+KEY · BATReference not shownDiagram red / source unlabeled
STAT · AC 1REG/REC · AC 1Reference not shownDiagram green / source unlabeled
REG/REC · DC +BAT · B+Reference not shownDiagram green / source unlabeled
STAT · AC 2REG/REC · AC 2Reference not shownDiagram green / source unlabeled
REG/REC · GNDGND · GND6 AWGBlack / frame ground
KEY · ONREG/REC · SENSEReference not shownBrown / switched voltage
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What happened on real bikes?

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Community reference
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