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Leaking Gas

  • Thread starter Thread starter JRossi17
  • Start date Start date
J

JRossi17

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I have a semi clear tube that is going to the bottom of the bike that is leaking gas a tad. Is this suppose to be plugged into something or is it an overflow. It spills out a tad faster when the bike is going. The bike is an 81 650 GL
 
Is it coming from a Carb, the gas tank sending unit drain or the airbox? If it's from one of the carbs your float is sticking open or your float valve isn't working properly causing the overflow. If it's the airbox, the same problems could be the cause or you've got some plugged carb circuits causing excess fuel to flood the airbox and exit via the airbox drain.

It's a serious problem and it needs to be corrected. A stuck float will unstick with a rap on the carb bowls with a screwdriver handle usually.
 
Hi,

Are you sure it's gas? What is the other end of the hose connected to? The normal drain hoses are from the fuel gauge sending unit, the battery, and the airbox. If you're battery is leaking then you are probably over-charging. Check the voltage of the charging system. If it's leaking from the airbox then a(the) carb(s) is(are) overflowing. In which case see this little article: [FONT=Trebuchet MS, sans-serif]Overflowing Carbs[/FONT]. If it's leaking form the fuel gauge send unit then you'll need new gaskets, if not the whole unit. See these articles for pictures of the suspect area: Fuel Gauge Send Unit Repair and Tank Cleaning.

Thank you for your indulgence,

BassCliff
 
Followed it up to the battery but i smelled gas before. Ill move it and run it again for a little bit and see if gas or the battery is draining. Battery is measuring out at 12.8 so im running alright there.
 
what does your multimeter say, connected to the battery, at 5k rpm?
 
That tube is to allow gases (hydrogen I think) to escape from the battery, not for fluid to escape. I suggest you check your charging system; it may be overcharging, which causes the fluid to boil out of the battery. Not good. Poor electrical grounds on the R/R are a classic GS problem, but easy to fix.
 
Alright so I got it running, it starting spitting out gas from the airbox tube and it must be dripping on the header where it connects to the head because that was smoking as well. The bike runs but you can see more then normal white smoke spitting out the exhaust and it wont idle.

So im guessing it is what BassCliff said and the carbs are overflowing. My question is i am guessing you need to take the tank off to get to the carbs, but is there a write up anywhere on how to take off the tank. I can also hopefully find where its dripping on the header.
 
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The tank is simple. Remove the seat, unscrew the tank mounting bolt, unplug the gauge sending unit wires, remove the petcock hoses (vacuum and fuel), pull straight back, it comes off the mounting ears (don't lose the rubber caps on the frame), and it's off. Make sure your petcock is in the run or reserve position too.
 
Easy enough, i was thinking there was bolts underneath the tank to undo as well. I might as well just rebuild the carbs anyway and save myself a bunch of headaches.
 
JRossi17 said:
Easy enough, i was thinking there was bolts underneath the tank to undo as well. I might as well just rebuild the carbs anyway and save myself a bunch of headaches.
Click to expand...

Truer words were never spoken.
 
Alright seat and tank are off but is there a trick to getting the carbs off in one big group, i have the air box side loosened up and the rubber pieces to the engine loosened.
 
JRossi17 said:
Alright seat and tank are off but is there a trick to getting the carbs off in one big group, i have the air box side loosened up and the rubber pieces to the engine loosened.
Click to expand...

Loosen the airbox attachment bolts and try to separate it as far away from the carbs as possible. After that it's all about brute force.:-\\\
 
So take the airbox out with it or loosen the screws that attach the air box connectors to the carbs and pull?
 
Hi,

On the 650 you might have to loosen the airbox and slide it back as far as possible (maybe even loosen the rear fender to give you an extra half inch) to get the carbs out. Then the airbox will come out.

Most of these processes are documented with lots of pictures on my little website. Your 650 might be a little different, but very similar.

See the Valve Adjustment (8 Valve) guide, the Air Intake Repair guide, there's also a copy of the carb rebuild guide and lots of other handy documentation. Read up.


Thank you for your indulgence,

BassCliff
 
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Will do, got the airbox loosened up just cant get it to slide out, will start again tomorrow weather pending and try to read up at work on break.
 
Hi,

Do you have a manual for your bike? You can download one from my website.


Thank you for your indulgence,

BassCliff
 
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