Has been doing this for a while i want to be sure if it is normal or not at about 7-8k it makes a really weird hissing/flapping sound on my 2008 250 i got a full Area P Exhaust anyone noticing this ?

 

could be loose plastics? i bought my bike from the dealer and got home and found fairing bolts falling out. give it a nut and bolt check, see if it goes away.

 

Does it happen at 7-8k RPM in all gears, or might it be a speed thing that you notice in 6th at those revs? 7-8k should be about 55-65 (ish) mph in top gear... if that's the only time you hear it I'd definitely check your bolts as mentioned above. It's possible you loosened a fairing or a fairing pad during your exhaust install.

If you're hearing it in all gears just at those revs, I'd wonder if it might not just be an oddity with the Area P exhaust and check specifically if Area P customers have that problem.

And when you say hissing, do you mean like water boiling away on a hot element, or something like the sucking sound an intake would make?

 

does it in all gears, fairings are all ok, i know area p skipped one of their bolts that goes to the frame in the mid range of the system so it could be the vibration.... by hissing sound is not somthing from the intake hard to explain, i guess in a tiny bit of way we can say grinding but nothings grinding just sound like