check the small o-ring around the mixture screw, check its ok not perished or split, when youre starting the bike after its cut out are you twisting the throttle? this will use fule/air circuits other than the idle circuits, where as leaving it to idle will only use the idle circuit.
so, it might start ok but not idle......
how worn is the slide and carb body....search on the net, throttle problems are pretty well known on the KMX200....think ive got a KMX 125 carb somewhere if the idle screw and oring are the same...
JayDee.
