OK, lessons learned.
About the inbus, that is the rear motor bolt so that should not be a problem.
Have a look at this picture:

You can see the left side footpeg and to be safe from getting my pants in the belt I put on a cover of carbon fiber.
The two bolts are pretty much in the center line of the belt so I figured it would clear the belt but maybe the holders have been rubbing off the belt, I will check for marks and let you know.
I will look for new belt too…
Update:
I realize that this was my mistake totally, the holders for the protective carbon fiber was rubbing the teeths off the inside of the belt, have a look at the picture:

I could not imagine that the movement of the belt was that big, it´s not easy to see when you´re driving.
I have to find another way to put the protector on or simply go with no protector.