Joe, did you try running it for a bit before the oil change? If not, the possibly the oil drained out of the clutch housing, and it just needs to get back in there, even though I dont know why that would make a noise (pretty sure it wouldn't but just a thought). You check the bolts on the cover to ensure they are tight.
2008 700xx; Power Bomb header with power core 4 exhaust, Power Programmer III, pro armor nerfs, prm products control front and rear bumpers and full skid, 10" ITP rears, ITP Baja's fronts, RZR 2's all the way around, Uni filter, 13t sprocket, CCP steering Damper, DS450 shock swap, Dual Gasser Throttle, bar risers and Moose barkBusters. 730XX kit plus other engine mods!