I rode an 08 yz450f last weekend. Just in the pits fpr a little while. Actually rode two of them. I have not been able to stop thinking about the bike since. I want one. They both already had Dr.D
pipes on them and one had the R&D float bowl.
Super smooth compared to my bikes (06 CRF450r and 07 KTM450xc). I was all excited and went over and told a buddy about how killer I thought they were. He said " dude ,MXA thrashed the new bike. " When I got home from he races I imediately bought the MXA online subsciption deal so I could read the test. MXA said that even if you put an aftermarket pipe on the 08 it would still be slower than the 07. They said it was down 6 HP from 07. I don't know if there is a bad batch of bike or what but the bikes I rode felt quick and there was no vibration at all. That alone made it feel better than my honda.
Keep in mind I have never got along with my Honda. I think the bike is super rigid and that the forks are brutal on braking
bumps. I have worked with the Honda for over a year and I'm done. MXA has said that the Yamaha
is a 180 from the Honda and I just figured out that I like the Yamaha
better. Even if it was just in the pits ,the Yamaha felt comfortable and just good overall. I never knew what they meant by smooth and vibration free motor till I got to ride the Yamaha. I had just stepped of my honda and the difference is hard to believs. I would put it like this ,The Honda engine feels like a Harley and the Yamaha feels like a GSXR. I dont mean in speed but rather how the motor runs even when just sitting in the pits. Just a lttle input from a guy that rode a couple of YZs. I will ride them again next weekend on the track and hope I come away with the same great feeling about them. I just hope I can hold off from buying one before then. The MXA test has me spooked.