bike idles at 900rpms when first started. as it warms up the idle increases and when i ride it the idle increases and will mnot return to normal until bike cools down and it's the same thing over again next time i ride it. anyone have any suggestions how to solve this problem? the bike performs very good other than that! THANKS! JUST BOB.

classic symptoms of an an air leak or the fuel has gummed up the pilot circuit in the carbs causing a weak mix