Check out the 3 threads in this link, the last one is wiznut's engine rotation thread. my rear rocker box gasket started leaking @ about 5k, i had the dealer fix it. At around 11k the front went, did it myself. It's pretty straight forward (easy). It is most likely your rocker box gasket.
http://www.buellxb.com/Buell-XB-Foru...ker-box-gasket