Does anyone have a new 2013 250 SX-F and notice much popping on deceleration? My son is at the track right now, called me and said it's popping on decel almost like on his old carbed bikes when they were jetted too lean on the pilot. It's 73 degrees there at the altitude is 3,650. The bike just turned over 2 hours and we have not done anything to it yet but change the oil and clean the air filter. Anyone replace the stock map switch yet with the more aggressive one? Thanks!