i'm sure your adventures will provide lots of grist for the mill around here.
many have done exhaust mods, to a variety of results. i think mr bracket did some of the most extensive testings and posted results. to my knowledge there aren't any full exhaust kits for our bike. he's no longer on here, but his Bee lives on in the backwoods of idaho. i've heard on full moon nights, when the wolves silence themselves, you can hear it buzz. it might be sasquach's favorite ride. it demonstrates a fondness for a certain pink pig. ???
lots have swapped out the xt/ttr stainless header for our stock tubes (myself included), more for looks or corrosion resistance, than for performance improvements.
the most common exhaust mod is probably an FMF backend. debates rage on whether this offers much more than added sound and bling. YMMV
they're fun bikes and i'm sure you will get lots of smiles/ mile out of it.
my tdub b4.jpg my tw200 metcalf.jpg