I know you've done a lot of carburetor cleaning lately, but something is still clogged. Like has been said, I bet at least the main fuel circuit is partially blocked. When you have the fuel bowl off, physically unscrew the main and pilot jets and blow them out with carb. cleaner. Then, take the can of carb. cleaner to the needle jet, which is located below the main jet, inside the 'tower' in the center of the carb. Let it soak for a bit, blow up through this hole with compressed air, and reassemble everything.
Also, look down the throat of the carburetor (where the hose from the airbox attaches) to be sure that none of passages you see in there are clogged. These passages are your main and idle air bleeds, and if one of them becomes blocked with a piece of debris, the engine may not recieve any fuel from the carburetor. Hope this helps. Carburetors are tricky and may require several attempts to get working again... B)