Sandy Whoops said:Venom, MX bikes generally don't idle very well. You can adjust the air screw and idle screw to achieve idle while in neutral. A 10 - 20 second idle should be adequate. Don't try to adjust the carb so your bike idles indefinitely - this can lead to other problems.
Expecting your bike to idle in gear while at a standstill isn't reasonable, though. There's always going to be some clutch drag. If you set the idle high enough to overcome this, you'll compromise the rideability of the bike (you'll lose what little engine braking a 2 stroke motor has, among other things).