Hi, Thanks for all the helpful info in this forum. With it I have been able to get a 2003 XR70R running again, which had sat stored with gas left in the entire fuel system for 8 to 10 years. The varnish was thick and hard and it took three efforts to get the carb completely cleaned. The tank was a mess too. Anyway it now runs, idles and starts easily enough. It revs, but it is running too rich. There is a little black smoke when it is off of idle, and it does not develop full power. It can be ridden, but it is clear that it is not running correctly. This became especially clear when I shut off the fuel while it was running, and as it is becoming starved for fuel it runs great for a moment before it runs completely out. I have two questions: 1. I understand that there is no way to adjust the mixture or the float. Is that correct? The float does not appear to be leaking. It has been dry inside each time I have checked it. Although, several times after getting the carb functioning again, fuel did come out of the over flow, but not continuously, just briefly then it quit. 2. When turned all the way in, the idle adjustment screw does not raise the throttle valve needle enough to keep it idling. It was necessary to adjust the throttle cable to raise the needle further to maintain idle. The cable is in about the middle of its adjustment, and I know the throttle valve is up off of the idle adjustment screw inside the carb body. Perhaps this is contributing to the rich condition and something else should be done to address the idle issue. Any advice on that? I'm going out to check the valves now, while the engine is cold. That is the only thing I know I can do that hasn't been done, but I don't think it can have any affect on the mixture problem. Thanks for the help.