I bought a CR250R this past April and it had a brand new silencer on it when I got it. In the last two weeks or so I have notice that the bike seems quite a bit louder than normal. It seems odd to me that I would already need new packing since the silencer is brand new. I have run the same packing in my 4-strokes for a couple seasons and never noticed such a drastic change in sound. Do 2-strokes just burn through packing quicker than 4-strokes?