its still in the back of my truck! bought it last night and havent ever riden it yet . I will say its way more responsive than any stock atv I have ever started. you just touch the throttle and the thing is at the rev limiter. guess thats because of the fuel injection.

 

the rapter is heavier so it will will get more traction off the line but if u now how ride and work a clutch well the yfz will win no prob

 

From all that I have read and seen...including the specs...

I would say that completely stock...

In a drag race or in the sand...the 700

On the track...the 450...since that is what it is made for!