On my particular RT I've mounted the gas tank below the carbs so I have a small fuel pump pushing fuel up to the four carbs. Today when I de-winterized it and started it, 3 of the four carbs leaked from the throat.
I'm wondering if the fuel pump pressure is to much for the bikes float valves? I picked a really low pressure model if I remember right it was 3-4PSI, I'm guessing a gravity fed system is like 1-2 PSI?. Its either the carbs valves cant handle it, the valves are shot or my float bowls are dirty.
I emptied the float bowls a few times to clear the junk, One thing I noticed if I run the engine it stops leaking I believe this is because the engine is drinking and one of the valves is always open and relieves the pressure build up. If I just run the fuel pump with the engine off the carbs flood and leak.
I'm sure many here have added a fuel pump and experienced the same problem?
Last Edit: Apr 20, 2020 16:16:20 GMT -5 by rtrikes
Perhaps you could put a time delay switch going to your feul pump. That could stop the leakage because the time(adjustable) delay Could be just enough where the fuel pump does not overfill the float bowls (or just builds up too much pressure in the float bowls). FI is another alternative but expensive.