I can't say that I would worry about the noise, but as Smo0oth states, it is a good idea to check them. The hardest part on checking the valves on this beast is removing the plastic and gas tank. As far as the switch, I haven't seen anything. But I imagine you could tinker with it, maybe use a resistor/rheostat set up or something.
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!