the engine stall when I stop on a eiger400 auto

 

Try raising the idle. I have the same motor in my 2002 Arctic Cat 400. There should be a black plastic **** on a 3 or 4 inch wand, turn 1 way it speeds up, other way slows down. Just don't get it too high, will mess up shifting. If thats not the answer, float could be misadjusted.

 

it idile fine it like the cluch wont disengage