Husqvarna
Hello!
I've got a 10' husky smr 510 with 24.000km. Last summer i got an engine knock, here is the link to a video of it.
it isn't that easy to hear, but the sound is alot louder than it appears. Gets louder as the bike revs aswell.
I have to say, i'm not much of a mechanic, but i'll get some...