I have heard thet the handling will be very similar. I have also heard the the KFX should out pull the yfz in a drag race. You cant always believe what you hear though. We will have to wait and see. If the handling is the same and the motor stronger, then the kfx should be the top seller for a very long time. BUT, by the dimensions, it is going to be very dificult for a larger rider to get comfortable and ride this thing to its full potential without some expensive modifications(Bar and peg locations).