Carbs are not refilling
I have a 1990 EX500, and I have recently cleaned the carbs (new jets, gaskets, ect). After completing this it seems that I have a vacuum issue. I connected everything back together and manual put fuel in the carbs, sucking on the vacuum line connected to the gas tank. When I do this the bike is able to start, and then I instantly connect the vacuum line back up to the bike and it runs for a few minutes and dies like it is not getting enough fuel, which at this point I drained the carbs and only a little gas flowed out. Next I adjusted the carbs to run richer, and still the same thing happened. Any ideas??