I have a 2003 400ex and when I pull the clutch in when I'm in neutral and shift dm down into first it doesn't work at all and it just goes forward and stalls I've adjusted the cable on the lever and by the motor and still nothing what do I do??

 

Did you oil the new fiber plates up,plus assembled the clutch back the way this diagram shows. Plates may be just sticking until they get enough oil.If you have the clutch right,have someone give you a shove while in neutral,then shift into gear and go through all the gear ranges.This might solve the problem after you ride it awhile.