What is this noise?

[h0ser81]

So the bike has been making this noise since I've bought it. It only seems to happen after the revs come down from blipping the throttle. I've done the valve adjustment and it doesn't seem to have cleared it up. Any idea what it is? It sounds like the auto decompressor but I'm not totally sure.

Video here!

[h0ser81]

So now that I listen to it more closely, that sounds seems to be coming from the carb/air filter area. I have no idea what it could be.

[nzgsr]

Sounds like the vacuum plate rattling.

[Roelsonia214]

I have the same noise in my 2004 crf.
Did u ever figure out what it’s causing it?
I was going to get a carb slide due to bad o-ring, am wondering if that’s what’s causing the noise.

[h0ser81]

I'm fairly certain it's the vacuum plate like nzgsr said above. I'll be ordering a carb rebuild kit sometime soon.

[Roelsonia214]

Ok thx for the reply