Overflow season 2 leak5/6/2024 ![]() If the tank is compressing.the tube would pull air.not gas.and it wouldn't end up leaking.If the tank was expanding,it MAY get some fuel in there from the top of the filler neck(most likely only when full up),but that would be very noticeable IF you tried to open the cap.It would blast open pretty well.Do you get ANY whistling through the cap when she's just been ridden and filled?Or any whistling at all through the cap.like sitting in the Sun or hot engine just sitting there. "fuel had been sucked through that drain tube up into the top of the tank".how does fuel get sucked up into the drain tube and into the top of the tank?The drain tube(vent)is not in contact with fuel.It can only allow fuel to come into it by isn't cool here.One tube?No.not okay.Take a look where your nipples are welded to the rear of the tank there.Does it look like someone MAY have sealed a tube there,maybe ground it down and plugged it,then sanded and painted over it?(WHY anyone would do that is beyond me).BUT.stranger things have happened. ![]() no welder is going to repair a fuel tank. I either case, you prolly need a new fuel tank. Maybe? Seems doubtful that the tube would be leaking internally-but another possibility. Sounds like the metal tube inside the tank has somehow developed a leak and when the fuel level gets below that point, the leaking stops. WHY would fuel be going into and out of that tube?You say it begins to leak at 7 ltr.WHY would it be doing that? Shouldn't there be a vent tube to prevent the tank from overexpanding or compressing? The tank is emmitting fuel so that it does not explode. I would say it is quite unsafe to operate the bike like that. the fuel might get pushed out of the overflow like an aerosol can when the air in the tank warms up from the engine heat. If the breather was cut off and welded shut, that would certainly cause a lot of pressure in the tank when the fuel and vapors got warmed up. There has to be two nipples unless the tank was modified. ![]() I only have one nipple at the rear of the tank which has the drain tube connected to it. It was clearly properly stored and babied.Īny other tips before I have to take it to the dealer next week where they are known to gouge people? the bike only has 12000 kms on it and looks imaculate. Everything looks fine but I really don't know what to check for. I have already removed the tank to examine it. I have also read that on many zx12s the overflow nipple somehow cracks allowing fuel to pass from the inner to outer tank. Is there a hose inside the tank? I couldn't see one. I have read a few posts that suggest the hose may have come loose inside the tank. Unfortunaly this was an auction purchase with basically no recourse.I'm SOL no matter what the problem is. I couldn't tell exactly where it came from but it was leaking pretty bad. ![]() After a couple of minutes idling gas started pooring out from the bottom left of the tank. I tried folding over the end of the tube and closed it off with a zip tie. Stopped and turned the bike off, continued to leak. Started the bike and it continued to leak. I went for fuel and only put in 7 litres when I started to see it dripping. Once the fuel is down to the last bar, it stops.
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