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Main Area => General GS500 Discussion => Topic started by: SS Adrenaline on November 03, 2013, 11:39:27 AM

Title: Carb Leaking Fuel advice please.
Post by: SS Adrenaline on November 03, 2013, 11:39:27 AM
Ok here's the story.
I did rejet for a lunch box and exhaust, see info below.
It seems like the fuel is coming from the small holes on the engine side of the carb.  After the butterfly valve.  I am thinking this is caused from improper float hight however when I rejeted I didnt touch the hight and was very carful with the carb.
Im also thinking I need to change my oil because I found it leaking through the air box mean it must have backed up on the intake side and then overflowed to the air box.
What else could be the issue? 
I initally though I have a stuck open float, once I got the bike running it didnt seem to leak.  I left it over night and there is a bit of fuel now sitting on the engine side of carb but no where near the amount as before.  Any thoughts or clarification?
Thanks.
Title: Re: Carb Leaking Fuel advice please.
Post by: dinkydonuts on November 03, 2013, 01:30:13 PM
Is the petcock on ON or PRI?

If left on PRI, gas will continually feed into the carbs while the bike is parked.
Title: Re: Carb Leaking Fuel advice please.
Post by: SS Adrenaline on November 03, 2013, 09:09:48 PM
It on the ON position.
Title: Re: Carb Leaking Fuel advice please.
Post by: robfriedenberger on November 04, 2013, 03:19:20 PM
Theres a thread on here to check the float hight with a hose, but since you drained the carbs to do the rejet you may have either bumped the float or even worse the needle valve could be dried out.

I would check the float hight and also inspect the valve.
Title: Re: Carb Leaking Fuel advice please.
Post by: frylockjim on November 04, 2013, 07:13:37 PM
i had the same problem awhile ago. when i took it apart, there was a little o-ring on the seat for the float needle valve that got all dried out and cracked. Once i replaced that little sucker, no more leaks. but i would check your float height, float needle condition, float needle seat/valve and o-ring for the needle valve seat.
Title: Re: Carb Leaking Fuel advice please.
Post by: SS Adrenaline on November 05, 2013, 06:26:08 AM
Quote from: frylockjim on November 04, 2013, 07:13:37 PM
i had the same problem awhile ago. when i took it apart, there was a little o-ring on the seat for the float needle valve that got all dried out and cracked. Once i replaced that little sucker, no more leaks. but i would check your float height, float needle condition, float needle seat/valve and o-ring for the needle valve seat.

You know, you might be right.  The carb has been sitting in the bike without fuel in it for about 1.5 years before I got to working on it.  I didnt think that th erubber would dry out this much seeing as the bik eis a 2005.  Does this mean I should store all my machines with fuel in the float bowls?
Title: Re: Carb Leaking Fuel advice please.
Post by: robfriedenberger on November 05, 2013, 08:03:30 AM
Only of a few months at at time, its hard to say for sure depending on the gas where you live. Obviously you will have to use a fuel stabilizer when you do that, but yes gas helps keep the rubber from drying out. When i store any thing with a carb on it for the winter I usually leave the bowls full
Title: Re: Carb Leaking Fuel advice please.
Post by: frylockjim on November 07, 2013, 10:41:13 AM
Quote from: SS Adrenaline on November 05, 2013, 06:26:08 AM
Quote from: frylockjim on November 04, 2013, 07:13:37 PM
i had the same problem awhile ago. when i took it apart, there was a little o-ring on the seat for the float needle valve that got all dried out and cracked. Once i replaced that little sucker, no more leaks. but i would check your float height, float needle condition, float needle seat/valve and o-ring for the needle valve seat.

You know, you might be right.  The carb has been sitting in the bike without fuel in it for about 1.5 years before I got to working on it.  I didnt think that th erubber would dry out this much seeing as the bik eis a 2005.  Does this mean I should store all my machines with fuel in the float bowls?

Definitely!!! if you store it without fuel in the carbs then it will dry up the o-rings inside. Once they get too dry, then they crack and wear and dont provide a good seal. I would store the bike with fuel in the carbs and if you plan on not taking it out for awhile, then start it up and let her idle for 5 min at least once a week. this will keep the fuel moving so it doesnt go sour. As for it being a 2005, it can happen. Mine is a 2006 and i had that problem.