3. INSPECTION/ADJUSTMENT DINK50/125 SECONDARY AIR SUPPLY SYSTEM Check the AICV (air injection control valve) This model is equipped with a built-in hoses between the AICV control solenoid valve secondary air supply system. The pulse and cylinder head for deterioration, damage or secondary air supply system is located on the loose connections. Make sure the hoses are not cylinder head. cracked. The secondary air supply system introduces filtered air into exhaust gases in the exhaust If the hoses show any signs of heat damage, port. The secondary air is drawn into the inspect the AICV check valve in the AICV reed exhaust port whenever there is negative valve cover damage. pressure pulse in the exhaust system. This charged secondary air promotes burning of the unburned exhaust gases and changes a considerable amount of hydrocarbons and carbon monoxide into relatively harmless carbon dioxide and water. 3-13