Okay guys here is the problem. What happens is the seal goes bad in the clutch slave cylinder, and it slowly starts to leak out. Now where does it go. I was asking myself that question. I figured out that when it leaks out it gets soaked by all the dirt and other stuff under that cover and it also leaks onto the exhaust, which causes it to burn, which in turn it disappears and nobody knows where it goes. This fix was fairly simple. Go to your suzuki dealer and ask about the seal around the piston inside the slave cylinder for the clutch. The technicians should know about it. Ive heard it is a common problem for the busa. You have to remove the shifter, coolant tank, the left side fairing of course, and a sensor uckon the cover, and the cover. You'll see what im talking about once you get in there. Good luck. Oh yea the seal was like $3.00 or somehwere aroung there