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General Category >> Rubber Side Down! >> gas leak - major
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Message started by mdurham on 11/16/08 at 15:12:24

Title: gas leak - major
Post by mdurham on 11/16/08 at 15:12:24

Hi,

The bike is a 1997 LS 650.

The bike has been running great, I've been starting it up on weekends just to keep the battery charged and the fluids moving, since it's getting pretty cold to ride.

Today when I started it up, gas started pouring out from, what it appears, somewhere from under the seat. Looks like around the vicinity of the air filter, well behind the engine. It dosn't idle good now either. Last week it ran and idled great!

I also noticed that when it gets warmed up, there's a little smoke where the exauste and cylinder head bolt on...never really noticed it before so I don't know if it is related.

Any ideas where the gas could be coming from. It just seemd to pour out somewhere under the seat, well behind the engine. I've pulled the seat and the side covers but can't see a thing. It seems to leak most when it idles a bit then I twist the throttle. Weird!

Thanks for any ideas how to trouble shoot this one!!

Title: Re: gas leak - major
Post by Yonuh Adisi on 11/16/08 at 15:20:40

Sounds like the fuel is pouring out of the vent lines. Might wanna check float needle and float level.

Title: Re: gas leak - major
Post by prechermike on 11/16/08 at 16:37:28

That sounds sort of like my vacuum line issue. I would check the vac line for gas.

Title: Re: gas leak - major
Post by verslagen1 on 11/16/08 at 17:16:17

Most likely your float and or valve is stuck.

Take plastic handled screw driver and rap the carb hard a couple of times with the handle.

the gas is coming out the vent tubes, these vent tubes are routed in various ways, but those that know stick them up into the frame under the tank where the top tube splits into 2, there's a hole.

Title: Re: gas leak - major
Post by mdurham on 11/17/08 at 16:47:46

Thanks!

Looks like the problem was a stickey float. All it took was a few hefty taps with a screwdriver handle on the float cover...and the problem is fixed :) Good to know about this in the future.

Thanks again!