... the Yamaha motor is kinda lazy feeling.
Problem with that?
By contrast to the CRF and the earlier YZ450's, the statement is true. They feel relatively lazy, hitless, dull. OTOH, my '03 is very exiting, but it's not as fast as the dull, boring, hitless '07. It's one of the world's best carried off illusions. It is definitely NOT slow, but compared to some of its peers, it feels like it. The effect is that much less concentration and effort needs to go into it to manage the power, so you can ride harder and faster for longer. It used to be that th eonly way you could do this was to reduce the power. Not so anymore.
In '03, all the mags, and thus most everyone else, said that the Yamaha engine was too aggressive, and should be more like the Honda, which was so much smoother and more controllable. As time went on, Honda changed to become more aggressive, and the YZF sought to emulate the smoother nature of the early Hondas. Yamaha has now perfected the art of building the velvet hammer, and now all the mags are suddenly saying that the Yamaha should be more aggressive, like the Honda. It is to laugh.