Please help to diagnose a noise?

[notoriusb.e.n]

by tractor i mean its a more gruff rumbly chugging noise than it is a sewing machine noise. it might be that the cam chain could be just on the way out, and its going to get more rattly if left unchecked.

Thanks for the rag tip. the exhaust is pretty loud so it does make determining location of noise a little awkward.

tried it on the centre stand in gear and yep, that chain does slap a bit.

Don't feel anything through my feet unfortunately so nothing there.

I will try and record it tomorrow and get it uploaded.

i've done the front sprocket nut upgrade so that certainly shouldn't be the cause.  good point about the sprocket being worn though. haven't checked that. will do.

also tried pulling the chain backwards off the rear sprocket and no budge at all there.