Was at Hallett this past weekend doing a track day. Went out for my second session and the clutch was slipping and I could not get any drive. So I limped my way back in and bled the clutch which on this model seems to be an ongoing issue with air in the line, but never with the clutch slipping. After I bled the clutch, it performed perfectly the rest of the day. Could this be a sign of future and/or continued problems with the clutch? I have an '04 749S with STM slipper clutch and open clutch cover.