I don't know anything about snowmobiles, but it seems to me that a beginner probably shouldn't be flying over mountains at breakneck speeds, especially with 2 other people in tow.
190hp sounds like a pretty powerful machine.
Edit: Just so I don't sound like someone's Grandma with my "you shouldn't do that sonny boy" :darnkids: I looked it up.
http://www.arctic-cat.com/snowmobiles/line...c=91&s=47&m=328
It's a "high performance" machine right out of the factory and that's with 150 horsepower. It weighs 516 pounds. It doesn't have a top speed listed, but I would think that it could go really fast.