Put a "vapor return line" from the carbs back to the tank. You can hook it up using a restrictor in the return line at the source from the carburetors; or wire in a fuel shut-off valve that is opened when the ignition is turned off.
Jon.
Good carburetion is fuelish hot air The most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes! The Carburetor Shop
