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This is a coloured version of the Honda official manual wiring diagram.

http://www.icdbdi.webspace.virginmedia.com/cb100/data/media/cb100n_wiring_diagram_coloured.png

Here is the same diagram with the indicator circuit removed, as is possible. It makes the circuits much clearer to follow.

This is the wiring diagram for converting a standard rectifier CB100n to use a regulator rectifier

as supplied by Rex Caunt Racing. Such a conversion makes the charging and lighting circuits work far better than standard.