Hello,\n\nmy SEF300 MY 2023 was very loud from the engine right from the start. The oil was always clean, I didn't worry about it. I bought the bike new.\n\nIt always sounds like a clutch rattle. Whenever I let off the gas I hear the rattle. Valve train can also be heard loudly.\n\nMy dealer said it could just be the cam chain tensioner.\nHe told me to pretension the cam chain tensioner a little more and then screw the spring back in.\n\nIs the issue known?