I have a 13 with the full SLP kit, if you move the air temperature sensor from air box up to by the gauge pod (SLP makes a kit) it will get much better. To eliminate the bog you need to put on a bigger more open air box like the BDX lightened hood it has an air box more like the race sleds. The problem seems to be warm air causing a lean or rich bog depending on where the temp sensor is - lean when in the lower air box (worse), fat when up by the gauge pod (much less bog), the way I ride the bdx hood eliminates the bog and you lose some weight but they are loud, not obnoxious but much louder than stock. Good luck and hope we all get snow soon