I've been thinking about turning a modernish mx or enduro 2 stroke in to an adventure bike. I was originally going to use a klr 650 or even my Buell Ulysses as a starting point but I want something lighter and more capable off road. I've been looking at using a wr 250 or a ktm 380 exc or something similar. Thing is I'm not really familiar with any of the bikes in the mx/enduro category and I want to know any other particular bikes that would suitable. I also have a few questions about 2 stroke dirtbikes in general. I've got a few requirements Reliable cheap and readily available under 230 lbs It would be nice if it was street legal, had a wider ratio gear box and tuned for bottom end or midrange power but I'm pretty comfortable making those modifications if they are possible. What kind of fuel mileage can I expect to get out of a 250 or a 380 2 stroke ridden moderately? Ive been thinking of using full rally style tanks with 8 or 9 gallons of capacity and I want to be able to get at least 250 miles to a tank. Speaking of fuel, can 2 strokes be detuned with just ignition timing to accept low octane fuel?