bt1100-wiring-diagramThe following Electrical System and Wiring Diagram apply for Yamaha BT1100 models. In this manual you will find detail information about the motorcycle electrical components, switches (checking continuity), bulbs and sockets, ignition systems (circuit diagrams and troubleshooting), electric starting system (circuit diagram, starting circuit operation, troubleshooting, and starter motor), charging systems, lighting systems, signaling system and fuel pump circuit.

Starting Circuit Operation
The starting circuit on this model consists of the starter motor, starter relay, and the starting circuit cut-off relay. If the engine stop switch is on “RUN” and the main switch is on “ON” (both switches are closed), the starter motor can operate only if: The transmission is in neutral (the neutral switch is closed). or if The clutch lever is pulled to the handlebar (the clutch switch is closed) and the sidestand is up (the sidestand switch is closed). The starting circuit cut-off relay prevents the starter from operating when neither of these conditions have been met. In this instance, the starting circuit cut-off relay is open so current cannot reach the starter motor.

Find the detail Yamaha BT1100 Electrical System and Wiring Diagram here (54 pages of pdf file docs)

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