The new YZF is on the cover of the July MXA. Actually the prototype is. Inside they say the production bike will of course have a bare unpainted aluminum frame. Also the traditional graphics. They said the 250F engine is basically unchanged but the 450F is an all new motor that has a more upright cylinder, shorter overall height and more centralized weight. Both bikes will see, as a result of the new frame design, a lower center of gravity by lowering the subframe, gas tank and radiators.