Here is the deal. I have a fc 65mm throtle body. Over the last month or so my idle will hang at what ever it is at the time that I press on the clutch. But if I tap the gas petal the idle go's back to normal. I have narrowed it down to the butterfly in the throtle body is hanging open. It is like the spring is not strong enuff to close it. Have any of you had this problem and what did you do about it.