What kind of MPG does the 2004 KTM 450 get. What is the largest tank capacity ? The stock one is only 1.85 gal so I´m thinking I want bigger. Overall for a 100 miles non stop on the road with this how would it rate? I´m looking for a bike that I can ride a long ways on the road then dive into some offroad riding without changing much. Is this a good bike for that. What else would you suggest in a price not over $5,000