Marbles

So I bought a 14 xp900 with 190 miles on it a few weeks ago. From day one it has kinda sounded like there is something rattling in the rear. I thought it might be suspension noise. But it does it even on smooth asphalt. Kinda sounds like something in one of the clutches or a loose chain or something like that. Kinda hard to explain exactly.
Any of you had a similar experience with your 900? Our 800 is quiet as can be as far as clutches and noise like this. Hell the thing is basically new, I can’t understand something being broken on it all ready. Any guesses would be great so I can check them out and eliminate them.
Thanks, Phil 🙁