Some motorcycles have a separate switch for the headlight that works independently of the ignition. If this is not the case, then there might be a short in the wiring for the headlight.
By turning the key to the off position, you are simply grounding out the ignition
diagram colors to conest ignition switch
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There are three headlight settings on your headlight switch. You can turn the low beam headlights on by turning the headlight switch.
Depending on the type and model of motorcycle, the ignition switch can be easy to change. Many bikes have a ring that rotates like a nut to remove the switch, then the wiring plugs on.
If you have broke your ignition switch or lost the key disconnect the ignition barrel from the white connector plug then pull off the the key hole then with a knife peel back the casing around the wires to bear metal and wrap them together and attach the ignition back and it should be like turning the key.
No, if it starts on its own without you turning the ignition switch then the ignition switch is defective.
Physically has a turning problem ? Try your spare key and still has the problem? Replace the ignition switch.
wiring on aftermarket dash mounted ignition switch
Set the multi-information display to TRIP A. Turn the ignition switch off. Press and hold the ODO / TRIP switch, and turn the ignition switch on (IG). After turning the ignition switch on (IG), keep holding the switch for at least 5 seconds.
first check your fuses then test the switch in different positions with a volt meter.