I took off the top bells of my carbs today to clean and inspect them and when I put them back on the car it will no longer start. I have had it running with a lot of pumping and cranking and keeping the revs up while sitting there but even that fails after a minute. What happened. It seems like it is no longer getting any fuel. I can hear the pump running. Seems odd the fuel filters would decide to clog up the moment I clean out the top part of the carbs. What could it be? It was running okay before I touched it. I can't see much I could have screwed up. 79 Silver Shadow 2