I just got a shiny new 07 YZ 450 to go along with my 04 WR450. I am totally aware that they are two different bikes, set up for two different things, but I am a bit disappointed. My WR will tractor up any hill in any gear and never stalls, but the new YZF does not like to be ridden at low RPMs, or tractor up hills like the WR. Will the GYTR off road flywheel help this out? I'm assuming it would help, but if anyone has some first-hand info on this I would greatly appreciate it. I was also thinking of going up 1 tooth on the rear. But these negatives do not out-weigh the positives. This things runs like a raped ape!!!