Ever since rejetting 165main, 48 pilot, pulling snorkle, uni air filter and w/bros headpipe and silencer Ive had high rpm/hard throttle sputter. Last night I went in to diagnose it and think I found the problem. I saw that there is a pin shaped like an allen wrench that goes down into the accelarator pump (the straight part of it), it has a small black boot on it where it goes into a brass fitting on top of the accelarator pump. The boot was not properly in place so I put it in the correct position. At the top part of this allen wrench shaped pin,(the bent, horizontal part) was attached to NOTHING. I looked at it an surmized that it was most likely supposed to be attached to a black hard plastic half moon shaped piece that has a decent size spring attached to it. I managed to get the allen shaped pin into the hole on the black plastic piece as it appeared that is where it should go. By then it was MIDNIGHT so I couldnt ride it around the block but did start it and it sounded and felt good, good throttle response. Is this where that allen shaped pin is supposed to be attached to???? I checked my manual but even then it was hard to tell. I sure hope so, it was a big pain in the ass to get it in there. Sorry if this is too confusing, Im hoping some of you just know from experience what I am talking about..