I can't judge audio recordings... but that does sound like something out of whack. Did you do anything to the valve train recently? Cam Chain ? My Bike makes that loud clack sound in the xmission upon shifting occasionally.
I learned through this forum
to spray some shpritz into those weep/drain holes on the sides of the cylinders... and blow them clean with air before loosening plugs.
All kinds of crap will fall into the c'bustion chamber if it's not cleaned out on top first...
ThX Forum!
I learned through this forum

All kinds of crap will fall into the c'bustion chamber if it's not cleaned out on top first...

ThX Forum!
