I completely rebuilt the twin carbs on a 1993 Kawasaki EN500 Vulcan. These are great little parallel twins with plenty of power. I replaced the Orings in the tubes between the carbs that were causing the leaks. With the carbs back on the bike I have spent the last two days trying to stop them from leaking still. I have adjusted the float levels. The leak is not coming from the float valve but I can see through the air box that it is coming out the back of the carb directly into the air box. Even with the float levels way below where they should be the carbs still leak. I can only surmise I did something wrong in putting the carbs back together. How can gas be overflowing into the air box when the level in the carb bowl stays below the level of the carb airbox throat? I have checked the float valves with the carb bowls removed. No leaking there. I can activate the floats manually and see when the gas stops flowing into the carbs. How else can the carbs be filling up with gas? People?? Graham
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