i have just got done completly rebuild a 2004 predator 500 engine. New crank, piston, main bearings clutch valves. etc.... it ran great for the first hours and now its cutting out (like its loading up) at 1/2-3/4 throttle. I've jetted and jetted and then jetted some more and changed needle and clip pos. i've adjusted the air fule screw, float bowl and everything. so i finally broke down and tried that dyno jet kit. still same problem. i have complete cleaned and service the entire carb and fuel system. i have seen on here that some other people have had this same problem. has anyone found out what causes this know problem?? and i am a certified motorcycle mechanic myself so please dont reply with " have you check if you have a full tank of gas.." thanks!! ohh and i live the mojave desert at alt. 2000-2500 at about 70 deg right now. thanks!!