I have a 1995 suzuki katana. I am having a problem with the bike running. If i spray starter fluid in the carbs the bike will run for a couple seconds then cut off. It is like gas is not getting to the carbs from the tank. I've had the carbs cleaned and the gas tank clean. The spark plugs are good. I think there is a problem with the vacuum. There is a vacuum line going from the carbs to the petcock but there is not one going to the engine. I can not find any type of diagram showing where the vacuum lines should go and how many there are. There is a hose coming off the cylinder head going to the air box but I do not see any other vacuum hoses. Any diagrams will be appreciated.