This sound disturbed me a lot, its more kind of mekanicaly klonking sound, other that Im used to!
My bike sound more like this;
https://www.youtube.com/watch?v=Z2HDQE3Hlpw&ab_channel=StanisaStankovicThere are no exhauste sound in your video at all?
This is a big thumpher, the exhauste sound is the major part of sounds?
In anyway, if one is riding this bike, its the bystanders that have to listen to the exhauste sound, and one only hears the camschaft doing its jobb, and the venturies!
Cant say if its a fault, but it sounds awfull, on your video!
Try anoher video.. outside!