I have seen a few people say that they have to put their carburetor's needle clips at the very top position for the lowest needle setting. This is the most lean setting I'm referring to. I'm in the middle of working on my bike but in the past I also had to have the needle clip set in this position for it to run well. This shouldn't be the case right? All manuals I've looked at say that the middle clip setting in the standard setting. So why are some of us having to put our needles in the leanest position?