My wife and I both have 2015 F3S' with about 10000 miles on them. They both have developed a problem with the hand throttle sticking, or dragging. My bike is a little worse than hers. I removed the back cover plate on the control attached to the hand grip (throttle). Cannot pinpoint the problem and affraid to take everything apart without more knowledge. I wonder if the little sleeve in there that rotates when turning the throttle can be lubed slightly with something without contaminating the sensor. Any info anyone can provide will be appreciated. Thanks.