StevieB, you dont say which XT you have but to be honest hit the search button and take your pic, this subject has been extensively covered and a little light reading will give you plenty of food for thought.
Kev (our resident tech guru) did an internal weight trick, remove the guards and swap for less rigid type, larger bar end weights, better handle bars, the list goes on.
Edit: you edited your post to say its a Tenere!
http://www.xt660.com/showthread.php?t=12164