does this sound like the valves are too loose? the oil level was low in these videos and the noise has gotten just a bit better after topping up https://youtube.com/shorts/neLvwO9qsdo?feature=share https://youtube.com/shorts/LKL9EooigKQ?feature=share
well one day the bike died while riding and after that it didnt want to start easily, but after i got it started, the sound appeared
Then maybe your cam chain tensioner has broken/fallen off allowing the chain to jump a tooth on the timing. Will need the cam cover off and have a look at chain tension and whether the tensioner is still in place and doing it's job.