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Old 08-15-2008, 09:14 AM   #1
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Old 08-15-2008, 09:31 AM   #2
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Hmmmm, I had two vent lines capped with a screw/hose clamp when I sold it to you (they were located at the rear of the tank in front of the crotch area on the seat). Reason was when I filled the tank full it would leak until the level of gas subsided a bit. One thing I was worried about when doing that was vapor lock on the gas cap. Anyhow, it never got vapor locked and the leaks stopped. Not sure what exactly you got going on if it happened with a half tank of gas. Are the 2 vent lines at the rear of the tank still "capped"?
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Old 08-15-2008, 09:50 AM   #3
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Old 08-15-2008, 09:55 AM   #4
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Quote:
Originally Posted by 1mudbug View Post
Yep. I was wondering about that but it runs fine and they don't leak so i an leaving them alone.

Should there be a loop in the vent line? I also had to put a different type of gas in a few days ago....would bad gas or diluted gas do this?

Its weird...and I want to ride.
I wouldn't think that the vent lines should be "looped". You said it was an oil/gas mixture. Are you positive the leak is coming from a vent line?
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Old 08-15-2008, 09:58 AM   #5
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Quote:
Originally Posted by 1mudbug View Post
Yep. I was wondering about that but it runs fine and they don't leak so i an leaving them alone.

Should there be a loop in the vent line? I also had to put a different type of gas in a few days ago....would bad gas or diluted gas do this?

Its weird...and I want to ride.
There should only be one "vent" line, and it sounds like you didn't jack with what Danny did (which should be the actual vent).

Is this the line that is near/ at the fuel petcock? Sounds strange.

Hate to say it man, but I think pictures are the best way to solve this if we can't see it in person. Too many variables.
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Old 08-15-2008, 09:59 AM   #6
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Quote:
Originally Posted by dbuck View Post
I wouldn't think that the vent lines should be "looped". You said it was an oil/gas mixture. Are you positive the leak is coming from a vent line?
That could be from the fuel dripping on the engine and bringing oil/ grime with it.
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Old 08-15-2008, 10:02 AM   #7
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Last edited by MudBug; 08-15-2008 at 10:05 AM.
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Old 08-15-2008, 10:13 AM   #8
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Hmmm, I hope it's not this, but if it is the culpret I'll be glad to help you fix the problem....maybe a couple of hours tops (since I've done it before )

http://www.motohouston.com/forums/sh...ad.php?t=39315

Not sure if that is the cause though as you said it has a gas mixture....I would maybe take off the countershaft cover (front sprocket cover), clean up all the grime as best as possible and determine if you have a leak from behind the front sprocket. Show us some pics man.
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Old 08-15-2008, 10:17 AM   #9
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Old 08-15-2008, 10:43 AM   #10
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Old 08-15-2008, 10:55 AM   #11
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Quote:
Originally Posted by 1mudbug View Post
I did check out everything. It is leaking from the vent line. When I put the bolt in the vent the leak stopped. But it caused the vapors to come up through the filler cap and ruin the custom flat black paint job.
Run it by Motorcycles Unlimited, sounds like an easy fix if you know what you are doing...or maybe that line is suppose to connect somewhere under the gas tank at the carbs. I'd have to look at it to see and remember. Is the vent line you "closed" long enough to reach somewhere or does it appear to have creases in it like it slipped on to a nipple somewhere?
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Old 08-15-2008, 11:06 AM   #12
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Old 08-15-2008, 11:22 AM   #13
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Old 08-15-2008, 11:26 AM   #14
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Quote:
Originally Posted by 1mudbug View Post
I just told it may be a float sticking in the carb causing this.
very well could be....I hadn't had the carbs cleaned or adjusted since I put the new motor in it around 24k on the clock. I'm sure it could use a good carb cleaning regardless, probably get you some better gas mileage as well.
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Old 08-15-2008, 12:27 PM   #15
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sounds like a Harley, lmao
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Old 08-15-2008, 12:57 PM   #16
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Old 08-15-2008, 01:02 PM   #17
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The ZX7's are notorious for the vent line cracking inside of the tank.

Unfortunately there's no easy fix.
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Old 08-15-2008, 01:15 PM   #18
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Old 08-16-2008, 09:20 AM   #19
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Old 08-16-2008, 11:00 AM   #20
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I can't imagine how the carbs can cause this- if the float is "sticking" you'd know it when you run it. It would either not run if it's stuck closed, or it would overflow out of the carb overflow vent if it was stuck open.

Sounds like you got it though, good on ya!
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