Ok guys I have 01 CR250, I love it, but I can't say I'm not VERY interested in the new 450F from Honda, as well as the WR's. BUT WHY DO you need such a HUGE silencer on a 4 -Stroke?? Even my kids XR50 has a bigger silencer than my CR250. Is this something to do with compression? I know Nothing about 4-strokes.