[07ninja]

Hey guys I'm new to the zx6r world but I have a 07 zx6r and it seems to be leaking gas from somewhere. I've looked at all the hoses and have the tank off as we speak. It appears that gas has eaten the paint off under the front of the tank where it bolts to the frame.it then runs down the left side of the tank (if ur sitting on the bike) and then down the frame in front of the left foot peg. Any ideas of where it's coming from?

 

[RedAndBlack]

Maybe a weld has corroded. If you have the tank off, should be pretty easy to find I would think. Completely wipe the tank off and prop it up on something and see where fuels leaking. Can't be that hard to find.

 

[NatBrown]

Like RedAndBlack said, empty the tank, wash it down really good with simple green or another cleaner to remove all the gas on it now. Let it dry for a day or two then fill it up, let it sit and see where it leaks.

My money would be on the spot where it's rusty and the paint has come of the tank in picture 3 though.

 

[Ebster1085]

Seeing several rust spots on the underside of the tank...

Likely spots for a slow leak.

 

[07ninja]

Tank is empty and drying out now. I'll clean it real good and fill it up when I get home. I didn't see anything leaking when I took it off but it may be a slow leak. I did find a small hose on the bottom of the air box that was off. That might be where everything on the side of the bike is coming from?

 

[NatBrown]

There is no fuel present in the air box. The hose is to drain oil that gets pulled in from the valve cover breather system. There really isn't much oil present as it's vapor mostly and accumulates over time.

 

[Strider]

You could also keep the tank empty, close the filler cap and plug the breather vents, then submerge it in water and see where the air bubbles leak out of the tank from.

 

[RedAndBlack]

You could also keep the tank empty, close the filler cap and plug the breather vents, then submerge it in water and see where the air bubbles leak out of the tank from.

I understand the science behind it but water and fuel, never a good mix. Lol

 

[Scorpi0]

I understand the science behind it but water and fuel, never a good mix. Lol

I always dilute my fuel with water....helps save money lol.

But if its a small leak hes barely gonna get any water in the tank. Obviously hes gonna drain it out before putting fuel in there again....hopefully.

He could also plug all the fuel vents and connect a hose to one of them. Blow on the hose while the tank is submerged. I think it should be easier to spot the bubbles this way.

 

[07ninja]

I'm gonna try to pressure check the tank and see if it holds. If not, I'll know it's leaking somewhere. If I put water in the tank I will most definitely let it sit for a few days to dry out completely. If I go the submerged method, what should I plug the fuel pump hole with?

 

[Scorpi0]

Buttplug

 

[Strider]

You can plug that hole with the fuel pump.

 

[07ninja]

Found the crack. Now to see if it can be welded

 

[ZXROM]

How could you not smell or see gas with that big ass hole LOL!!!

 

[07ninja]

How could you not smell or see gas with that big ass hole LOL!!!

The crack wasn't near as big til I blew air into the tank. Then it got real big. I could always smell gas but I thought it was just from the pressure built up inside the tank. Guess I was wrong. Nothin ever leaked enough for me to see.