I own a 2001 cr125. It's been rejeted and has a set of Boyesen pro series reeds in it. I just scored a brand new pro circuit platinum pipe for $55 on **** for it. I now have the oportunity to buy either a fmf shorty silencer or a pro circuit 304 factory sound silencer for it. Any advantages or disadvantages to either silencer. I love the midrange hit that my bike has and don't want to loose it, but a little more bottom end would be nice. I do mostly trail/woods riding.