I might pull the tensioner out. Not just the screw but the whole assembly from the cylinders. Inspect things for missing parts. Drain the oil, pull sump and look up inside for loose parts.
Leo
I did undo the 6 bolts and pull the tensioner out, nothing missing from what I can see on the fiche. I'll drop the oil once I've tried a few tension adjustments. Would the kick start be binding due to over tension perhaps...