Nessism wrote: Any debris in the tank? Even a small flake of rust can get under a float needle and hold it off the seat thus leading to leakage and overflow. Some people use filters to protect from such things, just be very careful to select your filter carefully and make sure it's designed for a gravity feed fuel system. Paper filters for pressurized fuel systems won't work, although they filter better that a mesh filter.
Another thing to check is your petcock. If there is internal leakage there may be fluid leakage down the vacuum line and into the carbs that way.
Thank You.
Petcock was long gone.
It was leaking even after I've rebuilded it with the new set. The needle just wouldn't sit right. So, I've modified it to ON/OFF (PRI is ON and ON is OFF). No leaks on OFF.
Vacuum hose is gone and ports are sealed on both ends.
Also, I will install electro magnetic fuel valve before I put the carbs back on.
Even modified, petcock still have its own filter. I've left it on.
Due to the fact that all checks cleared, I've decided to put them back on.
There were pods on instead of an air box. I have an original air box sitting around.
I know it's a wrestling match to put that all together but that will be another topic.
Thank you again!