I totally dislike anything fourstroke in a quad or dirtbike. I would much rather see a 250r whoopin on a yfz than having it the other way around. I don't care what brand it is as long as it gets things done in two strokes. I am not saying that I would rather ride a blaster than a yfz or anything, but if I had a choice between a stock 250r and a stock yfz, I would take the 250r without giving it a second thought.
If you really wanna see how I feel about them, read this