theres a noise from my KA sounds like a popcorn machine kinda rattling noise what the hell is it?
Timing chain. Guide might be off.
Buy an SR. 
SOHC or DOHC? Upper timing guide removed if DOHC? Where is the sound coming from - valve cover at the front or…?
Could be one of a few things…
just do it
hard to tell its coming from the valve cover but can’t make out where exactly
could be knock sensor… pistons hitting valves… clutch rattling… timing guides… who knows… does it still do the same sound when pressing the clutch or not? if that sound is still there then id say something with engine
even harder for us, being over the internet and all. 
Have a friend rev the engine.
Sounds like it’s either the chain guides or you could have some ticking valves. Pull the valve cover off and remove the top chain guide, put the cover back on and see how it sounds.
If it’s still there it’s prob a couple of ticking valves and thats not really a big deal. I have a couple myself and I’m not worried.
Let us know.
Easy 8)