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Main Area => General GS500 Discussion => Topic started by: skirecs on January 18, 2011, 02:45:58 PM

Title: Leaking carburetor
Post by: skirecs on January 18, 2011, 02:45:58 PM
My left carb is leaking from the boot area, and I don't know why
its making it really rich and rough, with smoky exhaust that has that smell

both needles look conical, the seats are clean, and I replaced both seat o-rings.

both floats float, and I set the tabs the same. The right carb is perfect and the plug looks nice, the left not so much.

I just switched the floats between them just to experiment and I'll check it tomorrow, its 30 degrees outside and working with gas and metal has made my hands frozen.


any other things that could cause fuel to overflow? I just remembered someone had a vent blockage, I'll also check that tomorrow.
Title: Re: Leaking carburetor
Post by: Big Rich on January 18, 2011, 03:24:54 PM
Only things I can think of is dirt above the float needle, a slow leak in the float, or the barrels of the float is at 2 different heights.
Title: Re: Leaking carburetor
Post by: skirecs on January 18, 2011, 06:37:45 PM
Quote from: Big Rich on January 18, 2011, 03:24:54 PM
Only things I can think of is dirt above the float needle, a slow leak in the float, or the barrels of the float is at 2 different heights.

im pretty sure the needle and seat are clean, ive had it apart many times now

ill run a dowel in there to see if i can polish the seat a little
Title: Re: Leaking carburetor
Post by: The Buddha on January 19, 2011, 07:27:54 AM
Quote from: skirecs on January 18, 2011, 06:37:45 PM
Quote from: Big Rich on January 18, 2011, 03:24:54 PM
Only things I can think of is dirt above the float needle, a slow leak in the float, or the barrels of the float is at 2 different heights.

im pretty sure the needle and seat are clean, ive had it apart many times now

ill run a dowel in there to see if i can polish the seat a little

Dowel ? what kind of dowel - man, you cannot use hard stuff like that, clean it with a Q tip and wd40.
Cool.
Buddha.
Title: Re: Leaking carburetor
Post by: skirecs on January 19, 2011, 11:03:05 AM
someone had reccomended using a wooden dowel pointed a little bit to polish the seat a little

i didn't have to do it since the 4th time i took the carbs out and cleaned and put them back together must have done it

fuel level is right where it should be, started right up in 30 degrees, pretty good for 21 years old i think

now its just gotta sit for another 2 months while i go back to school
Title: Re: Leaking carburetor
Post by: scratch on January 19, 2011, 11:08:34 AM
Check choke plunger rubber?

If the bike runs without suffering fuel starvation, then we can rule out a torn vacuum diaphragm in the fuel petcock, which would also dump raw fuel into the left carb on early carbed GS's.
Title: Re: Leaking carburetor
Post by: The Buddha on January 19, 2011, 02:22:43 PM
Quote from: skirecs on January 19, 2011, 11:03:05 AM
someone had reccomended using a wooden dowel pointed a little bit to polish the seat a little

i didn't have to do it since the 4th time i took the carbs out and cleaned and put them back together must have done it

fuel level is right where it should be, started right up in 30 degrees, pretty good for 21 years old i think

now its just gotta sit for another 2 months while i go back to school

Well my thought wasn't that it was not going to start ... that implies too low a fuel level. I thought it may be too high. Set it to the gasket level, make sure its there if you did set it there. It should start when its 30 degrees, but not without choke and it should start with choke when its 100 degrees and bone dry. You need it slightly rich everywhere. Just not sooty black rich ... just choclate rich.
Cool.
Buddha.