I wouldn't do it. Tried to make the 450's work for 2 years in the woods and it just didn't work out for me. Alhough the fueling on the 2015 is much better than my 11 and 12's were, I do not plan on racing a hare scramble with it. First gear too tall, 2-3 kick starts (more when hot), and the overall weight are just not conducive to great lap times. If you're a top pro, it's manageable, but otherwise stick with the 2T or go with the 250FX.