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Old 11-11-2007, 06:35 PM   #1
ninjathatcould
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Another fuel tank problem

Last night I started smelling burning gas a notice a nice little cloud of smoke coming from my engine. I decided to mess with it today rather than at 2am, so i went outside pulled off my tank and found this:

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The fuel tap line was connected, however the "drain line" was not. My question is why was gas coming out the drain line if the tank was no where near full?

I didn't think that was possible, so my next idea was the fuel tap had malfunctioned (it was leaky before) causing all the fuel above the reserve amount to drain. When I took the tank off, it only had a small amount of fuel in it and a large stain where the puddle from last night was. Perhaps the fuel tap is bad?


I just need reassurance that I'm not going to have to buy a new tank

Any ideas? Should I get a new tap and drain line (as it seems to have fallen off somewhere)?
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Old 11-11-2007, 07:36 PM   #2
Patrick
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Was the fuel coming from the vent tube or the petcock?
The ZX7's are notorious for having the pressed in elbow of the petcock to leak / seep.
If it's coming out of the vent line with the tank level and not full, the vent line have a small crack inside of the tank, something I've seen before on ZX7's.
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Old 11-11-2007, 07:37 PM   #3
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I believe the overflow should only drain if there was gas spilled between the fill tunnel and the top lock door. Take tank off and refill. See where's its coming out while not on bike. You can cap off the tap line that would feed the engine rail. I like to bench test things before I jump to conclusions.
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Old 11-11-2007, 08:08 PM   #4
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It doesn't have a fuel rail, it's carbuerated.
What ever you do, don't cap the vent line and run the bike.
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Old 11-11-2007, 08:25 PM   #5
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Quote:
Originally Posted by Patrick View Post
Was the fuel coming from the vent tube or the petcock?
The ZX7's are notorious for having the pressed in elbow of the petcock to leak / seep.
If it's coming out of the vent line with the tank level and not full, the vent line have a small crack inside of the tank, something I've seen before on ZX7's.


i think its both!! the petcock leaks because of a faulty seal (just looked at the smiley face gasket, and its ripped) and i think the vent line may be cracked as you say, no other reason the gas should come out of there, correct?

how does one get this repaired?
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Old 11-11-2007, 08:29 PM   #6
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If the fuel tank vent line is cracked inside the tank, it's pretty much gone in my experience.
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Old 11-11-2007, 08:31 PM   #7
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! no bueno. 670 for the OEM tank.... bike down for a few weeks... excellent...

i want a new bike.
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Old 11-11-2007, 08:56 PM   #8
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Chris,
If you get time, bring the tank down and I'll check it out.
In the meantime I'll look for a good used one, check Ebay too.
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Old 11-11-2007, 09:00 PM   #9
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On/off topic... the busa gets oxidation/corrosion on the gas door I am assuming from the key slot... any ideas? I used h2000 to clean it up before but it comes back. Any type of grease you'd recommend that wouldn't clog fuel filter? Or do I have an o-ring problem from the key lock?
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Old 11-11-2007, 09:03 PM   #10
Patrick
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Is it polished or is the OEM coating corroding?
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