My 400 ex doesn't idle right. It will be fine one stop and be idling high the next. Something is not right but I don't know what. It has been apart because I had the stock air filter bolt get sucked down the carb and ate a valve last year. Vacuum leak?? Any ideas?[img]i/expressions/face-icon-small-confused.gif[/img]

 

I think that they have an idle adjuster screw on there, somewhere, or else you should have it torn apart and checked for something wrong.