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Gas leaking non stop

Started by CndnMax, April 18, 2011, 12:34:29 PM

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CndnMax

I just replaced my fuel lines and now my right carb is leaking non stop into my air box. It only stops when I shut off the petcock on the tank, it will leak in ON-RES-PRIME doesn't matter which. The bike will not start at all anymore. Any ideas?

reload

sounds like float valves or the float height. disassemble carbs and inspect

mike__R

I'm sure somebody will correct me if I'm wrong, but yes the float(s) are bad or set wrong.  Also, wouldn't the frame petcock be bad too?  From what I understand on "ON" or "RES" there needs to be vacuum to flow fuel through that petcock, so if it is flowing with the bike off there is something wrong there as well.
1995 GS500 on a 2000 frame with F front added
2001 SV650S
2008 VTX1800F
1975 CL360

Yuri.

This happened to me twice in the last two months, both times I tried draining the carbs first and it didn't work, what did work both times was to close the fuel from the tank and let the bike run until it stalls.
But I'm guessing that is no permanent solution as it happened again, if it happens another time I will pull the carbs out to clean them.

CndnMax

Mike- that's what I thought too??
Yuri- I would try that but I can't get the bike started at all. And my drain screw is seized in place.

How hard is it to disassemble the cards. There's a lot of hoses connected to the carbs, looks complicated.

reload

Quote from: mike__R on April 18, 2011, 12:55:10 PM
I'm sure somebody will correct me if I'm wrong, but yes the float(s) are bad or set wrong.  Also, wouldn't the frame petcock be bad too?  From what I understand on "ON" or "RES" there needs to be vacuum to flow fuel through that petcock, so if it is flowing with the bike off there is something wrong there as well.

Yeh sounds like the petcock is also damaged. diaphragm problem?

Yuri.

#6
Quote from: CndnMax on April 18, 2011, 01:17:26 PM
Mike- that's what I thought too??
Yuri- I would try that but I can't get the bike started at all. And my drain screw is seized in place.

How hard is it to disassemble the cards. There's a lot of hoses connected to the carbs, looks complicated.
Did you really try it hard? When it happened to mine it was really hard to get it started.
You must not use choke, as the mixture is already very rich. Also both times when I was able to get it started I was turning the throttle(so try it on various degrees and several times).
I don't know if makes a difference, but both times I only closed the fuel from the tank after letting the bike warm up and after it stalled I just turned the fuel on after half an hour or so.

Oh, the first time I had this problem was after removing the tank for the first time, by handling it some dirt probably got past the filter and into the carbs.

moosehead28

As others have stated, it is likely your floats or the needles are worn, as far as taking them apart to clean, it looks alot harder than it really is,

Just pick up a manual, and follow directions, I find it helps to take pictures of the hoses before removal so you can reference how they were routed when you put it back together


BaltimoreGS

To ask a dumb question, are you sure the lines are run correctly?

-Jessie

centuryghost

Quote from: BaltimoreGS on April 18, 2011, 05:54:17 PM
To ask a dumb question, are you sure the lines are run correctly?

-Jessie

This is where I would start.

Things were fine till you replaced fuel lines, correct?
This is the old cb400f cruisin' the viaduct

CndnMax

#10
Quote from: centuryghost on April 18, 2011, 06:30:58 PM
Quote from: BaltimoreGS on April 18, 2011, 05:54:17 PM
To ask a dumb question, are you sure the lines are run correctly?

-Jessie

This is where I would start.

Things were fine till you replaced fuel lines, correct?

I had Double checked the lines , not much to miss. It wasn't leaking before but there was gas spots on my filter for a while. I let it dry out and managed to get it started. Everything is staying dry now, no more dripping noises comming from the air box lol.
Mostlikely a temp solution to sticky float since it was only comming out the right one.

*should I be worried about gas in the oil since everything was pretty much flooded?

centuryghost

Cool. Didn't want you tearing apart carbs if you didn't need to. Occams razor sort of thing...

As for gas in the oil, definitely change the oil sooner than later.
This is the old cb400f cruisin' the viaduct

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