Yamaha 2011—the WR250X
Key Features: Directly descended from our YZ motocrossers and WR off-road machines—even the original Yamaha YA-1 of 1955—the WR250X is here to make Yamaha’s off-road prowess street accessible. Not exactly an enduro, a supermoto or a sportbike, the WR250X is for riders who ride mostly paved surfaces. Its sibling, the off-road inspired WR250R, is for riders who spend more time in the dirt. Engine: 250cc liquid-cooled, DOHC engine with two titanium intake valves and two steel exhausts, forged piston and plated cylinder for outstanding durability. Pentroof combustion chamber with downdraft-type straight intake helps make excellent power across the rev band, with maximum power at 10,000 rpm. First use of fuel injection on a 250 Yamaha on/off-road bike. The system relies on input from a crank sensor, intake air pressure sensor and throttle position sensor feeding a compact ECU to provide optimum combustion. An ECU-controlled EXUP® exhaust valve, along with an electronic intak...
