That appears to be a problem or at least the weakest link. (the connection between the friction belt and motor.) I have had that probelm on all of my bikemax cycles. Instead of spending $150 on an entirely new belt... I went to a local plant that had conveyer belt material... measured, cut and punctured holes for the screws... done... cost... such a small amount of material... it was free...
bodybydesign, July 2009