Although these are guides, the author does not advise anyone to actually build or even consider building such devices. Read, but do not act upon this information. Everyone should just live a quiet, pastoral life because the dogs of law lie around every corner and I have no wish to be closed down like other useful websites from threats by parasitic lawyers. (When lawyers get rich, society gets poorer.)

Always try to improve society rather than just take from it. Until then, lawyer stuff. Contents for illustrative purposes only. All material herein is subject to copyright, patent and other intellectual property rights. Copying, duplication or transmission of this material whole or in part is not permitted without the written permission of the author. Contents subject to change without notice. Errors and omissions excepted. All rights reserved. No responsibility is accepted for any damage or any injury caused by this information. No-one should try building machines without reasonable abilities and know that injuries can ensue from the materials, tools and from test riding of machines.
Copyright (C) J.Partridge. 1985. 1998. 2003.

Generic Wiring Diagrams.

The following are basic wiring diagrams for printing as a starting point. The following selection of basic drawings are given. They are 800 x 600 pixels. They do not include the colour codes , as all motorcycle manufacturers differ.
These give the basics for most common bikes.
Print direct, or Copy and paste, or import them into any simple paint package so you can modify them, then go from there.
It is always preferable to use the original manufacturers wiring diagram for the engine used. If no wiring diagram available, choose the nearest for your bike from the above diagrams. The main items to look for are the type of alternator, and the type of points or electronic ignition used.
The main clues from the bike are the internal wiring of the alternator, the number of wires on the rectifier/regualtor. Also study the components available for the electronic ignition if fitted.

1 a single cylinder with points ignition and direct lighting.
2 a single cylinder with points ignition and battery lighting.
3 a single cylinder with electronic ignition and direct lighting.
4 a single cylinder with electronic ignition and battery lighting.

5 a twin cylinder with points ignition and two plugs per coil.
6 a twin cylinder with points ignition and two ignition coils.
7 a twin cylinder with electronic ignition and two plugs per coil.
8 a twin cylinder with electronic ignition and two ignition coils.

9 a four cylinder with points ignition and two plugs per coil.
10 a four cylinder with electronic ignition and two plugs per coil.

11 a trike with four cylinder motorcycle engine.
12 a trike with car engine and points.

14 A very basic Harley wiring diagram. No indicators.

15 a car with points ignition and basic lighting.
16 a car with simple electronic ignition and basic lighting.

17 a typical basic motor boat.

For many small bikes without advance and retard on electronic ignition units, such as motocross and mopeds and small scooters, then see also the 'A Builders guide to alternative electronic ignition', available via the authors website.

Extracted from other monographs on my website.
Copyright (C) J.Partridge. 1985. 1998. 2003.