i am now the owner of a 2004 DL1000. looking into ways of shaving weight from the bike and i see claims of 12 - 15 pound weight savings when installing aftermarket slip-ons. sounds good, but maybe comes at too high a price unless there is also an asssociated power gain. has anybody done head to head dyno runs with OEM vs aftermarket exhausts? i would be very interested in seeing what the differences are and where they are in the powerband. i have read only posts that address the seat-of-pants opinion.... informative, but not generally accurate( don't louder pipes always 'feel' quicker?). anyways, if maybe someone could post up dyno charts, or point me to some that are on display, i'd be most greatful.