Strange rattle when letting off revs

[mbmO8]

Hi all, this bikes a constant headache and it’s newest addition to the issue list is this strange rattle that the bike makes when I get off throttle and let the revs drop. I have no clue what it is and I’ll attach a link to a video of my bike to demonstrate it

heres the video

Any help would be amazing I’m honestly just going to sell it once it’s all working fine

[Calum]

It sounds sweet!

It's not the powervalve end cap is it?

[mbmO8]

Are you hearing the rattle about a second after I let off ?

It’s heard on all revs but the first

[Calum]

@mbmO8 yeah I hear it. Obviously it's hard to identify it on a video.

But often the powevalve can come loose and that might be a sign of it. Whip the right hand side off and have a look to see if the bolt has come loose.

[mbmO8]

You’re a genius haha that’s exactly what’s happened, there is play in the pv. Am I ment to place a bolt through the hole to tighten it ?

[mbmO8]

I’ve had someone listen to it as in person is obviously way better then a compressed video and think it may be the piston rings