is this a new problem that just came out of the blue or have you always had this problem and if it is a new problem is it getting any worse if so I would check for any carb/tbi / manifolds leaks as this could be causing your issues, so with out a little more info it is sort of hard to tell or at least it is for me, so if I can help just let me know, you can check for air leaks by removing & just replace them as a preventive maintenance the seals and etc are just around $10.00 - $15.00 dollars if you do it yourself or you can use the old fashion way of getting the bike up to normal operating temp and spray some "your choice carb cleaner, wd 40, brake cleaner or etc" in the area of the carb while idling and if you have a leak in the manifold/carb area the engine will speed up and change idle
