I HAD THE SAME CONDITION HAPPEN TO MINE.I WOULD SUGGEST DOING AN OIL CHANGE YOURSELF QUICKLY IF YOU HAVENT ALREADY.THIS PROBLEM IS AN INDICATION OF ENGINE WEAR.Mine came from particulate in an oil change i had done at the dealer.Continueing to run the bike like that will result in a complete rebuild which speaking from experiance is expensive.The next complication you will get is back fireing after \