My 2014 650 GT with 450 miles on it will surge at low speeds but not all of the time. It did it for the previous 3 days then yesterday it was fine. It is only at low sustained speeds, about 15mph, Really jerky. If you set it on the center stand and run the speedometer up to 15-20mph while holding the throttle steady it would surge and change speed by up and down by 5mph. It is the same tank of fuel over this time, 90 octane non ethanol. I did install the K&N air filter but it was during the time it was surging. Riding in to work this morning it seemed to run fine. Anyone experience this? I have an appointment at the dealer in Orlando tomorrow but I don't want to go all of the way there thru traffic if it's not going to act up for the technician.