2011 YAMAHA YZ250F , THE WINNING FORMULA, NOW HIGHLY CONCENTRATED 2011 YZ250 is a purpose-built 250, not a resized 450. The bilateral beam frame provides added cornering speed and stability, while the fuel tank is positioned closer to the center of gravity for light handling. The optimized engine delivers power in the low-to-midrange with a great torques and power for blasting out of the corners.