yfz is fater because has shooter gear through 1-4 but when you hit5 it is longer
yfz because of the twin cam design
That is something you will need to research on your own. The horsepower ratings are Honda 450R 42 hp and the YFZ 450 39 hp. But you are as aware as I am that hp ratings aren't the whole story, especially in the dirt. yamaha450-i don't care what people say a yfz450 is faster than a trx450...acceleration and top speed...a yfz is lighter (approx 100pounds) but a trx is said to last longer...honda is know for quality...but my yfz has been fine except for the water seal breaking...so as long as you service it properly I would go yfz
I heard the Suzuki has more top end speed but the YFZ is quicker
2004
no
www.gtthunder.com they dynoed yfz
42-43 hp
20 mph
if all quads are stock then the kfx and yfz will be quicker than the 700 but the 700 wil win in the long run because of its massive top speed, IMO the kfx will beat the yfz
go to gtthunder.com they have dyno charts YFZ 450 has 39 hp
no only in 09 the yfz450 and the 09 yfz450r