Yesterday I checked my clutch, swapped places of a few steelplates and turned the frictionplates around.
Today I decided to check, just for the fun of it, the belts. They are already 15,000 km old. ( and because of Ben’s [ http://www.powerwheelie.de ] bad luck..)
As you all know, the battery and the battery tray have to be removed, in order to gain access tot the front cylinder’s belt cover.
Well, here’s what I found:
WTF?

Check the frame!!

One of the wires is cut, pointing towards the camera.

I guess this is one of the infamous things that should be checked on all 916/996 bikes. But I only thought this problem is with the 2-phase alternator, not the newer 3-phase? Oh, well. I’ll swap the connectors to sealed AMP’s.
In early spring I did check these connections, sprayed connection cleaner and so on, but it seems that it wasn’t enough. Better check your stuff mid-season as well.
The belts were looking great, by the way… 

To check the rear belt, I only removed the middle cover and everything looked fine there, too.