I would keep an ear on it. These are known to be noisy. If it gets worse, I'd def check your valves. But for example, with my build, if I didn't hear anything, I'd be introuble. But I have different rockers and everything. So I would say you'd be okay, just be sure it doesn't get worse.
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!