My GZE's Tappet noise

[heshan]

Guys, the noise explained earlier its gone now.


So it WAS the pulleys as opposed to the valves..

But NOW, there's a screeching noise that comes when I rev the engine around 5 to 6K range.. It lasts for 100 200 rpms before it goes off but today it seemed to last longer..

This noise doesn't come when the engine just gets the running temp. It comes only after running 20 or 30 mins at running temp..

I think this is a pulley as well as I don't think this has anything to do with the tappets.. but my mechanic is adamant that its the tappets..

What do you guys think?

This noise, is there even in normal running but at very low volume and increases with revs and at some unknown reason goes to a screech at a particular rev under load.. For e.g. if i rev to 6000 or 7000 without much aggression the noise doesn't come but if i floor it then it comes..

Anyone experienced this before?

My mechanic thinks that by putting the engine oil treatment ABRO engine would run better.. Is this correct?