The bike you want is the Yamaha WR250R. 26,600 miles is the first valve check, fuel injection, butter smooth motor with a 6spd transmission so it can cruise comfortably at 60-70mph/100-115kph (mine tops out at 90-95mph/144-150kph) all day long, good suspension and lots of travel, comfortable stock seat thats made all the better with a sheepskin or aftermarket seat, big 350w alternator that can run heated grips, a 90w heated jacket, heated socks, and a GPS at the same time without issues or upgrades, and plenty of luggage capacity. Mine currently has 39,000 miles/62750km and I've never seen the inside of the motor; they're utterly reliable bikes. Its been nothing but standard maintenance, despite running it like a dirt bike in the woods, commuting on it year round (haven't had a car since 2009, owned this bike since 2010), and two long trips that combined are around 13,000 miles/21,000km and two months in length.

I've drowned it, hit trees with it, buried it in mud, buried it in sand, bashed it on rocks, dropped it countless times on and off road, held the throttle to the stop until I ran out of gas over multiple successive fill-ups on the highway, ridden in through the hottest of hot and lowest temperatures I could stand (5-115+ degrees F/-15-45+ degrees C), taken it from the lowest to some of the highest elevations I can reach in the US and Canada (-260ft in Death Valley to 14,000+ on Pikes Peak, -79m and +4250m+ respectively), and generally ride the shit out of it, and she's never let me down or even had a hiccup. Closest thing I've had to failures is a broken spark plug, and it was an aftermarket plug.

Fit a larger gas tank (stock is ~7L, IMS makes a 12L which I have and love and a 17.75L, Safari makes a 14L) or strap a gas can to the back, add a skid plate and radiator guard, and off you go. Fuel consumption is good at a reasonable pace, I average 50-55 miles per US gallons but can see as high as 70 and as low as 40.

There isn't a 650 thumper dual sport that's better at anything, except maybe droning zombie-like down the highway or maintaining speed into a massive headwind, than the WR250R.

__________________
2008 Yamaha WR250R