i built a lt 250 with a rotax 525 snow mobile engine.it was a nightmare,the clutches ended up sticking out past the foot peg on left side.and if you dont get the jack shaft perfect for belt tension it will eat 50 dollar belts all the time.than you run into cooling issues,the stock lt radiator would not keep it cool,and in most snowmobile engines the cooling passages are very small and restrictive.its almost like were designed for cold weather LOL.