Perforated overfill pipe: magic trick to fix this ?

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Hi, A good friend has an issue with his overflow (? don't know the correct name, but it's above the fuel cap seal so it's for rainwater around the filler opening) tube of the fuel tank on a 2007 Kawasaki Z750. A few months ago, he noticed that the water won't go down in there, so he used some chemical sink declogger and a wire, and it was eventually sorted out. Now, the tank is leaking through the tube, there's a mild spot of fuel on the ground coming from the rubber pipe attached to the tube. Did someone here been there and fixed that ? TIA, Super
 

Astro14

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He perforated the pipe with chemicals - ouch...he's ruined his tank. So, to fix the leaks, because it goes through the tank, he needs to replace that pipe. Depending on how the tank is made - solder, braze or epoxy a new pipe in place, ensuring a perfect seal. OR, what's likely the most simple, and most likely to work: buy a new tank.
 
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Originally Posted by Astro14
He perforated the pipe with chemicals - ouch...he's ruined his tank.
Yeah I think basically the chemical cleaning left the inner unprotected and prone to rust, and it finally perforated.
 
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As long as the bottom tube is still intact, seal it or cap it, seal the top end and carry a sponge to mop the water inside the filler neck. Use fuel proof sealant, and THINK before your next fix. Smoky
 
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Originally Posted by Smoky14
As long as the bottom tube is still intact, seal it or cap it, seal the top end and carry a sponge to mop the water inside the filler neck.
Using this kind of fuel cap to prevent the puddle of water going in the tank when opening the cap with the stock cap ? This : [Linked Image from ae01.alicdn.com] Stock : [Linked Image from probolt-france.com]
 
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couldn't some epoxy be poured into the tube and a coating of it could stay in place when drying ? adjusting the ratio of the 2 components
 
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First of all, he won't know the extent of the damage until he removes the tank and gets the fill assembly and vent separated from the tank. Hopefully he hasn't messed up the tank. If the tank is unharmed, he will need to replace the fill assembly and vent. If the tank is messed up too, he will have to replace everything and get the tank painted. Expensive lesson either way.
 
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"...he noticed that the water won't go down in there"? "The bottom of the tube"? "The rubber pipe attached to the tube"? Here is where a drawing is worth its weight in gold. Sounds like a "rain drain". They need to be cleaned routinely just like sunroof drains but nobody ever does.
 
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Originally Posted by Kira
". Sounds like a "rain drain". They need to be cleaned routinely just like sunroof drains but nobody ever does.
It sounds like his corroded or rusted through.
 

Astro14

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Originally Posted by Linctex
Originally Posted by Kira
". Sounds like a "rain drain". They need to be cleaned routinely just like sunroof drains but nobody ever does.
It sounds like his corroded or rusted through.
After he "cleaned" it with drain cleaner and a wire...chemical corrosion and physical damage caused by poor methodology...
 
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Originally Posted by Superflan
Now, the tank is leaking through the tube, there's a mild spot of fuel on the ground coming from the rubber pipe attached to the tube.
Ideally, stick a borescope into the tank and see if you can spot the damage to the tube. If there's only a small amount of fuel, then I'd guess the tube was probably pierced somewhere above where the fuel level is now, otherwise the leak would be constant. And if the damage is high up enough, your friend might be able to manage it by simply not filling the tank up past the damage point. Otherwise, he's probably looking at tank replacement.
 
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Thanks everybody for your inputs. Yes, it's the "rain drain" that seems perforated and let fuel escape. From the parts diagram: [Linked Image] So I understand it's not a standalone part. So either blocking it both ends and preventing liquids going under the top of the fuel cap assembly, or replace reservoir? No fluid epoxy way someone ever tried? I learn something here: I never saw or heard those motorcycledrains being clogged, first time always come.
 
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Maybe the best way to go is to call your local motorbike shops and see what they can do for you. The tank may have to be removed and go to the shop. There comes a time to turn things over to others. Yes, any tube exposed to the elements can become clogged. Many times, mud daubers are the culprits.
 
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