Thanks for your reply. It was already clear to me that it was engine oil. :-)
When I put the bike on the centrestand, the oil level is a bit over the max. ( 12.000 km service done in june by my Honda dealer). To be honest I've never checked it before because you normally don't need to check the oil level of a Honda;-)
The reason why I started to check my bike was that yesterday after a ride, the bike smelled as if something was burning!
Today I dissasembled half the bike to see if I could find a burned e-wire or something else that looked burned. Couldn't find anything.
To make sure, I will go to my dealer tomorrow.
I hope there in nothing wrong, because on monday the bike has to be ready for a trackday, something I won't tell them!:-)