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When a Honda 150 motorcycle has no spark in the spark plug, it could be a spark plug. Ignition coil. Pulse coil. Injector nozzle. Tip sensor. Sidestand sensor if the motorcycle has it. Ignition. Blue wire may not be coming down positive from the ignition when it turns on. Or it could be that the blue wire that comes from the ignition to the control unit could be broken, if it's not one of these parts, the problem is the control unit.