I haven't had my 2006 500 4x4 get hot enough for a light to come on (not sure it even has one, since it's not an XP), but the fan comes on sometimes. Arct
When my Arctic Cat ATV gets hot, it helps if I can start moving faster, to move more air across the radiator. Stopping it will cool the engine down, but it might cool down quicker if you were kind of zipping along over smooth terrain - if that's even possible/available where you ride - to move cooling air across it.
Any chance you have anything blocking the air flow up front? Fancy bumper, winch, grille plugged with brush?