My Buddy now has an 08 YFZ, I will honestly admit it pulls a lot harder out of the hole but i cant stand to ride it. I think its the foot peg to bar ratio, im 6,2' and when i ride it i have to lean way back b/c i feel as if I am going to go over the bars if the back end bucks. I feel more at home on the honda. But I do like the taller stem, so i added Gibson +1 and Flex Bars just to get the extra rise out of mine. But stock for stock the yammi feels stubby and twitchy.
And to add, he spent about 3 hours trying to find a bad ground wire, it was cutting out the motor. There also know for that too.