Was riding the other day, noticed my bike was running a little rough. Figured I had something in the float bowl, intended to check it later. Started racing around with my buddy, and noticed an instant burst of power after about 2 miles of hard riding. When he pulled up behind me, he noticed the screen on my FMF Power Core IV-SA was blown out - a hole about an inch around. I've had this pipe for about two years, checked the packing a couple of times but was always clean. Anyone else ever experienced this?