I raced my bike in a Midsouth Winter Series Race yesterday and noticed the following about the bike. I had a bad stumble off iddle past 1/4 throttle. The bike would not lug and several in instances stalled while trying to accelerate. You had to feather the throttle to get in upper rev range. The starting was excellent in all situations. I would describe the throtle response as very lazy and loaded up feeling. Once you got past the stumble the bike rocked. Quarter to full throttle response was awe inspiring. This is the fastest dirt bike I have ridden. The power was very linear and the suspension soaked up everything with the brakes working very well. I will be going back to a 45 pilot jet to see if I can clean up the bottom end. I suspect the combo of the starter jet and pilot jet are to much. For now I am leaving the starter jet alone since the bike starts so well and this is the same jet in the YZF. I just cant figure how the YZF gets away with an even smaller pilot jet. The bike was definately lean when I broke it in and I had no popping or back firing at all yesterday. I would really like to hear other peoples experiences with jetting. I know I am close and would like to get some input from others.