My bike is an 09 Beta 450 RR. Everything is stock in the engine department. It has always popped a bit on decel, but it seems to be getting louder, expecially if I chop the throttle at high rpm on the road. The other issue is sometimes when I go from idle to WOT too quickly it stalls. The popping seems like a sign of it being lean, but the stalling seems like it's rich. Do I need to clean the carb or change my jetting? If it helps I ride at sea level to 2500 feet, temp usually around 10-25 celsius.