NRG Power Rattle? PLEASE HELP

Hello, i have a 2010 piaggio NRG liquid cooled version, and since ive had it there has always been an annoying rattle when you rev it up. You can hear it as you come off the thottle after revving it fairly high.
it is not rollers, starter bendix, and i very much doubt it is crank bearings as there has been no play in variator since i got the bike 5 months ago.

 

this is a video of the rattling noise

 

you sure mate? sounds really pronounced to me! every time i rev it you can hear what almost sounds like marraccas shaking right as the revs peak/right after, have another listen, that sound definitely shouldnt be there.

And as for the garage no way, i was recently charged 200 quid to have faulty electrics sorted out and a new battery. fuck the garage

 

Yes I managed to run it without the case on or bendix on, and the rattle is still present when I rev it

 

baffles loose in the exhaust? one of your mates put some gravel down the exhaust?

 

Nothing to do with the exhaust, I've had a new exhaust since having the rattle, it's an engine rattle

 

best start stripping it out then