Motorcycle Electrical Wiring and Circuits - Fix My Hog Here’s a circuit, an unbroken path or circle for electrons to flow, to bring all that we have learned so far onto the table. This video shows us how our motorcycles run on circuits Dan's Motorcycle "Wiring Diagrams" What's that you say? Your motorcycle is a dirt bike and has no battery? Not to worry. You can't use a Circuit Tester Light but you can use an Ohm Meter. If you use the Ohm Meter it will send a very low voltage charge through the wire and measure the amount of resistance to that low voltage charge going through the wire.