Have you checked your tank to make sure your clunk is back where it should be? Then check your tank feeds to see if they have a pin holes in them, I have had a couple of engines that dogged out because of air leaks in the fuel lines, never could get them to idle. Lost tank pressure would make you have to run your engine in a very rich setting. Have you tried letting the engine warm up then pull back to an idle place the glow driver on the plug, if it speeds way up you are too rich. If your carb is the air bleed type you want to screw the low speed screw out to get more air to the mixture. If its twin needle type screw it in in 1/8 or less turns till you get no change when you apply the glow driver. Then test to see if you have good transition. In my opinion, i hate remote needle assemblies they are to variable in their working properly. Oh by the way wd-40 doesn't do a good job in finding air leaks in model aircraft engines, if your going to use something to look for air leaks try short squirts of ether, starting fluid.
wra