During my ride today it seemed as if my exhaust got louder, as if the silencer needed to be repacked, but only at times. It seemed to sound normal again after shutting it off and letting it cool for a while, but then started sounding louder again. My silencer is a Turbine Core 2 and shouldn't need to be repacked yet. I run C12 race fuel, does this burn the packing up faster? Any other ideas?