It's a knocking that happens under the following circumstances:

* light load
* rev high then completely let off throttle
* it gets really fast when it is about to change gears

Isn't noticable at idle. I just pulled off each spark plug one by one and the knock was still there. The sparks tickled a little when it grounded on me.

Known issue ... got a used eha and it is junk. Leaks fuel out the bottom just like the other.

Can I rule out rod bearings at this point? I just changed out my belt tensioner and tensioner shock. The belt went loose. I verified it was bad by putting it in a vise and rotating it. It stayed where I put it which indicates a bad tensioner. I went with febi. The one that came off was FAG which I assume was oem.

Somebody has suggested lifters. Just still troubleshooting.