Hoi together, I bought a used BMW S 1000 R privately in September 2021 Year of construction 2016 with 13400 km. After the purchase I first had to get to know the machine and at the beginning of this season I always noticed a quiet kind of clacking / rattles in a constant from 4,000 revolutions it became louder and louder. Current mileage is at 16400 km. That can not be healthy my first guess was on the chain tensioner, because the machine always at the start a loud rattle of itself now I suspect a camshaft damage with abrasion of the towing lever. Callback from BMW ? Is it a known problem of the series ? Does anyone have experience what it looks like with culant from the manufacturer ? Does any of you have similar experience with its S 1000 and can give me possibly a hint ? ?? The previous owner called the rustling as completely “normal” only it has now become ever louder and louder over time.