I am trying to get a 05 RMZ250 to start. The bike will fire and run for a couple or revolutions then it dies. To get it to fire I have to crack the throttle numerous times. So far I have checked the following: Compression cold - 55 psi Leak down test - 97% Valve clearance - in spec, a little loose on the exhaust valve the decompression lever works on Decompression lever - replaced Spark plug is new, I have tried a couple different ones at this point Ignition coil - primary coil resistance is right on the money, the secondary is giving a measure of 13 kohms, manual wants 10 kohms, I don't think this is an issue as I am getting a good spark and the bike does fire. Fuel is fresh. Carb - stripped it down and checked orifices and jets for clogging, it looked very clean. You can see the accelerator pump working correctly. I am stumped and at a dead end, help!