Thank you all for your ideas and thoughts.
Me and my friend decided to take a closer look at it. 2 hours past midnight....
The rubber or "the rubberchainwheel" was simply to dry, i didnt have any smoothing creme avaible so i used olive oil (((TEMPORARLY))) :2thumbs:
And the sound is gone! I LOVE VIRGIN OLIVE OIL
Thnx ;P But yes im sure.
Besides it has no clutch hehe.