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2008 Kawasaki KLX140 / KLX140L Wiring Diagram - Electrical System Schematic

Kawasaki KLX 140/140L wiring diagram with handwritten owner notes marking the front headlight switch, battery and ground; shows ignition coil, magneto, starter motor, relays and color code key.

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This document is a scanned page (15-8 Electrical System, Wiring Diagram) from a Kawasaki service manual, hand-labeled "2008 KLX 140 / KLX 140L." It shows the complete electrical schematic for the KLX140 dirt bike, including the 12V 6Ah battery, 10A main fuse, starter relay, starter motor, regulator/rectifier, main relay, igniter, ignition coil, spark plug, crankshaft sensor, alternator, neutral switch, starter lockout switch, engine starter button, engine stop switch, and ignition switch (with LED). Wire colors are marked throughout using abbreviations, and a legend defines the color codes: BK=Black, BL=Blue, BR=Brown, G=Green, R=Red, W=White, Y=Yellow. Engine ground and frame ground points are indicated. The owner has added handwritten annotations documenting an aftermarket headlight installation: a headlight with High/Low/Ground leads, a headlight switch, a kill button (start), and an added 5 Amp fuse spliced near the main relay circuit. A reader can trace factory circuits (starting, charging, ignition) and see how the owner wired auxiliary lighting into the bike. Note that although uploaded under a 1990 Ford Bronco gallery, the document explicitly applies to the 2008 Kawasaki KLX140/KLX140L motorcycle, not the Bronco.

This document covers 2008, which may differ from this 1990 Ford Bronco.

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Frequently asked questions

What size is the main fuse on the 2008 Kawasaki KLX140?
The diagram shows a 10A fuse in the main circuit near the battery and starter relay. The owner also added a handwritten 5 Amp fuse for an aftermarket headlight circuit.
What battery does the KLX140 wiring diagram show?
A 12V 6Ah battery.
What do the wire color codes mean on the KLX140 diagram?
Per the legend: BK=Black, BL=Blue, BR=Brown, G=Green, R=Red, W=White, Y=Yellow. Combinations like BK/Y or W/R indicate two-color striped wires.
What electrical components are shown in this diagram?
Battery, 10A fuse, starter relay, starter motor, regulator/rectifier, main relay, igniter, ignition coil, spark plug, crankshaft sensor, alternator, neutral switch, starter lockout switch, engine starter button, engine stop switch, ignition switch, plus engine and frame grounds.
What are the handwritten additions to this diagram?
The owner sketched an aftermarket headlight (High/Low/Ground), a headlight switch, a kill button (start), and a 5 Amp fuse added near the main relay wiring.

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