hello, I am having trouble with my 2000 yz 250 starting. alittle background- 230psi cranking compression, 0 air leaks, ride mx 1500ft elevation, temps vary from 60 to 80 currently. engine was rebuilt about 20 hours ago, new everything. Jetting- 175main, 45 pilot, 2nd clip stock needle, air screw varies, stock #7 slide. The plug looks good. When I start it for the first time of the day it never wants to start. It fires and dies, sputtering out. If I use the choke it starts easier, but nothing like it used to. I have to hold the throttle cracked until it warms up completely before it will idle. The rest of the day it struggles but if I crack the throttle slightly it starts 1-2 kicks. I just switched to the 45 pilot from a 48, the idle seemed better with the 45. I also put in new reeds, fuel inlet needle and fresh packing. The bike started doing this around ten hours ago, before that it was a one kick bike. Any help would be greatly appreciated, thanks, George.