Burgman 400 - drivetrain issues?

Hi Reddit, I'm currently on a long trip through Spain and my motorscooter starts having issues. First a high buzzing sound appeared from the Vario or clutch. the motor performed normally. Today we rode 500 kilometers on the highway without issues, but when we left at a toll gate the motor struggled to accelerate up to 30kmh, after that it performs normally.

It now also makes a noise when accelerating, and it pulls forward when idle. We drove from the highway to our hotel in San Sebastian. at speed without issue, but from a stop it's a struggle. Its holy week, so for sure today and tomorrow all the workshops are closed. Anybody a clue what it can be? Broken roller or spring in the clutch? is it something that I myself could temporarily fix (I have the toolkit that belongs with the scooter with me).