A good starting point (it should be relatively the same for the XB):
http://www.youtube.com/watch?v=rv8DY5Prl5c
Other links that might be helpful:
http://www.twinmotorcycles.nl/artike...cid=20&aid=329
http://www.buellxb.com/Buell-XB-Foru...2ss-suspension
http://badweatherbikers.com/buell/me...tml?1235762414
But the manual is pretty straight forward and I'm not a super mechanic so if you're having a challenge you may want to just take it to a shop to set it for you. Better to be safe, than sorry....