that is pretty fast for a tank of fuel. How hard were you riding it? As in the RPM range? I can usually go 3-4 hours of riding before I hit reserve. Are you sure you were completely full to begin with. And everyone makes those mistakes at one time or another LOL.
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!