I agree, the 450 is coming out. Yamaha and Honda have it, do you think Zuki is gonna sit back on the 400? I'm not gonna believe the " my friends buddy who works at so-and-so dealership" yadda yadda, I'll just wait, may be awhile, the 450 dirt-bike came out not too long ago. I'm still happy with what I have now. Then when the 450 comes out, the wife gets the 400...

 

According to ATV RIDER mag. DOUG GUST and JEREMIAH JONES will ride the YOSHI Z400/450 for the 1st half of this season and switch to the new Z-450 for the 2nd half.Hopefully this is the way it will happen but,don't hold your breath.As far as engine size goes HONDA's is 449cc and is no better than the 439cc YAMAHA mill so I don't think that will be a big factor.I think when all is said and done they will all be very close in performance;Besides, you're only going to get so much for $6500 or so dollars.If they put too much into it then it will drive the cost up to a point that sales will suffer(kinda like CANNONDALE)............JMO