So after hearing slightly louder tapping for about 4 days on my gen1 my engine gave up I’ve read on forum that usually those engines are louder than Japanese bikes and I only got s1k for 2 moths so wasn’t too sure if it’s normal but when I’ve heard knock during my last ride I’ve stopped immediately and recovered to the local garage. Drained oil and we found a bit small bit of aluminium in it. Not sure yet what’s could it be but I’m afraid that I will need new engine. Absolutely devastated, don’t ignore any tapping noises guys