I am hearing a knocking sound from the left side of the engine. The sound can be heard after revving the engine and the rPMs start to decrease/ go down after 4000 to idle. When i'm revving the bike and the rPMs go up, I can't hear the sound.
You can hear what I hear in this video: https://www.youtube.com/watch?v=6MhL...ature=youtu.be
on 0:25 sec.
It's not a sound from the chain tensioner or the valves. The alternator is ok as well. There is a doubt that it could be the rod bearing or piston pin, but why do I hear it only when rPMs goes down?