1 - 30GENINFOFEATURESAIR INDUCTION SYSTEMThe air induction system (AI system) introduces fresh air into the exhaust port in order to burn theunburned gas (which is present in the exhaust gas) in the exhaust pipe. The burning of theunburned gases in this manner enhances the efficiency of the catalyst and results in cleanerexhaust gases.The AI system takes a portion of the air from the air cleaner, sends it to the reed valve via the aircut-off valve, and introduces it directly into the exhaust port through the reed valve.The air cut-off valve is controlled by the signals from the ECU in accordance with the combustionconditions. Ordinarily, the air cut-off valve opens to allow the air to flow during idle and closes to cutoff the flow when the motorcycle is being driven. However, if the coolant temperature is below thespecified value, the air cut-off valve remains open and allows the air to flow into the exhaust pipeuntil the temperature becomes higher than the specified value.The reed valve is provided on the cylinder head cover above the cylinders, and sends air to theexhaust pipe through the inside of the cylinder head.1 Air cut-off valve2 Reed valve3 Exhaust port4 Resonator1 2 43
