I payed 1600.00 to just have the entire engine rebuilt.
I changed the CCT, Cam Chain, Top Guide, Front and rear sliders all by myself. Took a long time, you need to pull the head to replace the front (if I remember right) slider which is a bitch. I got it all back together and had some bad oil leaks and a couple other probs. I just bit the bullet and saved some cash and took the bike to a independent mechanic.
My bike is a horror story all by itself though