Honda CBR600F4I (2001-2003) [87/492] Secondary air supply system

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MAINTENANCE Inspect the radiator hoses for cracks or deterioration and replace if necessary Check the tightness of all hose clamps and fasteners SECONDARY AIR SUPPLY SYSTEM CYLINDER HEAD COVER This model is equipped with a built in secondary air supply system The pulse secondary air supply sys tem is located on the cylinder head cover The secondary air supply system introduces filtered air into exhaust gases in the exhaust port The sec ondary air is drawn into the exhaust port whenever there is negative pressure pulse in the exhaust sys tem This charged secondary air promotes burning of the unburned exhaust gases and changes a con siderable amount of hydrocarbons and carbon monoxide into relatively harmless carbon dioxide and water Remove the air cleaner housing page 5 60 If rhe hoses show any signs of heat damage inspect the PAIR check valve m the PAIR reed valve cover for damage Check the PAIR pulse secondary air injection hoses between the PAIR control solenoid valve and cylinder head cover for deterioration damage or loose con nections Make sure the hoses are not cracked EXHAUST PORT Check the air suction hose between the air cleaner housing and PAIR control solenoid valve for deterio ration damage or loose connections Make sure the hoses are not kinked pinched or cracked 3 18

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