im not sure which one i was thinking the yfz i love the ride of it but havnt rode the 700r yet i been on the 660 and its ok i do alot of trail riding but i hit the track all the time what one wouls suit me best my last quads were a lt250 and a 03z400 (now totaled)

 

YFZ for the track unless their is an open class at your track, and the YFZ can be trail ridden.
So, YFZ450 IMO

 

i half to agree, yfz 450 all the way

 

it depends on witch riding you do more then the other if you ride trails more then mx the raptor 700r because its a trail macjine but is lower and wider then the 660r so will handle better on track but if you ride track more then trails the yfz because its the best race bike out and can be trail ridden. its up to you

 

I say go with the 700

 

If you ride the track more, YFZ, if it's trails 700R, if it's an equal mix, I'd go with the YFZ. It also depends on how tough your trails are, up here in Washington State, we have some really knarly, nasty, mountain climbing trails that I would never take a YFZ up, but I would take a Raptor.