My 08 C14 with 40,000 km has started to get air in the clutch hydraulics if left for a few days without riding it. I can't see any sign of a fluid leak but somehow the air is getting in. I have to bleed the clutch every time I go out to ride. The clutch fluid was changed at 20,000 km and it has worked fine until the last couple of weeks. I wondering if anyone else has had this problem.