This is just an opinion... disc brakes on motorcycles and cars work in the wet, so I dont see why snowmobiles wouldn't. My concern would be that you would be increasing the possibility of getting water around the carbs . As you know, some wet could be sucked into the carbs which is risky at best, but also the moisture can get around the cables and freeze during a stop in the action. Ive had problems in the past with older sleds after drift hopping where snow got in, melted and then froze over night . Some how the water got into the choke plunger area and caused them to stick open . took me awhile to figure that one out too. I dont think I would leave it on.