I currently own a '04 WR250F that I dual sport (90% dirt - 10% street) and my range on 1 tank of gas is about 120 miles. What is the range of the 450? From what I am reading here it is only about 60 miles - that would not be acceptable. I know I could add a bigger tank but I like the light weight of the 250 and a 450 with a bigger tank my be to much to handle. I am only thinking about upgrading because of the added power - it sounds like it is a monster compared to the 250 and that power intrigues me.