YZ400F idleing problem need help today

I am posting this for my friend, he is having a problem on his yz400F. He was messing around with the idle and now it wont start. He has a manual but it dosen't mention anything about the idle. How does he put it back to stock? He tried turning it up and then turning it down to try and see if it would work and it dosen't. The bike will start and run for about 5 seconds and then just die. He check the spark plug, changed the oil, and cleaned the air filter. The problem started after he messed with the idle.

What is the stock idle?

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