HI MY NAME IS NIKO I HAD THE SAME PROBLEM WITH MINE AFTER BEING IN GREECE FOR NEARLY TWO YEARS AND THE BIKE WAS SITTING...ANY WAY...THE PROBLEM IS COMING FROM A THERMO WAX VALVE THATS ON THE THROTTLE BODYS WHICH EXPANDS TO DROP IDDLE ONCE HOT...I DONT KNOW IF YOU CAN CHANGE THE VALVE ONLY BUT THEY CHANGED MY THROTTELE BODIES.... I HAVE EXTENDED WARRANTY SO I DIDNT HAVE TO PAY ANYTHING BUT THAT WAS IT IV NEVER HEARD OF A VALVE LIKE THAT EVEN THOUGHT IV OWNED A LOT OF BIKES... I HOPE IV HELPED YOU AND I HOP THEY SELL THE VALVE BY ITSELF..