Hey everyone. I recently purchased an 83 xl600r. I am rebuilding the carbs right now and stumbled on this video about the 86 model http://www.youtube.com/watch?v=lOCDfy46mbU at about the 4min mark D-Ray refers to what he calls the "low speed mixture screw." My carb doesnt appear to have that and I cannot seem to see it on the exploded view of the carbs in my shop manual. There is a hole on both carbs that looks as though it would take on of those screws but it is empty. I am wondering if there were slight differences in the design of these carbs over the years. I do have an idle screw that is still intact and has a limiter tab on it. It is in a completely different location however. Any help would be greatly appreciated.