I was just on the yamaha website and it says that the 2006 yfz-450 is a true 499cc. Awsome

 

yea they jumped it up like 9 or 10cc or something like that

 

Yeah it look sweet!

1. Even more performance: a larger, more powerful, 449cc engine, revised carburetion, head design and ignition timing produce even more of an excellent thing—and an increased-capacity radiator keeps it cool.
2.More comfort: a longer steering stem, new handlebars and a thicker seat make the YFZ450 nice to ride for a long time.
3.New, eccentric chain adjuster mechanism simplifies that job, and a new, twin-piston rear brake caliper provides strong, controllable rear braking
4.Most powerful, industry-exclusive, five-titanium-valve engine and 350-pound dry weight give the YFZ450 the best power-to-weight ratio of any ATV ever produced

Lets see what the competition has to respond with.[img]i/expressions/face-icon-small-smile.gif[/img]

 

they should have made it a 449cc the first year.

 

Agreed....always tyring to make there quads sound bigger...it's funny people are excited that it's actually what the name tells them this time! [img]i/expressions/face-icon-small-tongue.gif[/img]

This is kind of like the 421cc "450 Wolverine" HA!

 

Or better yet, a 760cc "800" Sportsman.

 

Yea [img]i/expressions/face-icon-small-tongue.gif[/img] That was the big one this year, hahaha, companies are funny

 

wow, between the improvements on the yfz and the soon to be released z450, i cant wait to see honda get smoked again.

 

yep 80 changes on the yfz450. i like their bill balance xc one .to bad you couldn't get the 470cc motor he's running in his though.

 

how much more power can 10ccs really give it? 1 or 2 hp