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Main Area => General GS500 Discussion => Topic started by: Merkurio24 on April 02, 2007, 06:27:14 PM

Title: Is this normal on carburetors?
Post by: Merkurio24 on April 02, 2007, 06:27:14 PM
Please check the video..

http://www.youtube.com/watch?v=U2ucOkrCNyM

and this is ever worse!

http://www.youtube.com/watch?v=V5xqMTbSfeU

Title: Re: Is this normal on carburetors?
Post by: krypto35 on April 02, 2007, 07:02:03 PM
couldn't you have just asked "is it normal for the right slide to move when cranking while the left one sits still?"  :cookoo:  and to my knowledge, no - carbs are supposed to move in syncronization.  you may have a vacuum leak - is the vacuum hose attached from the left carb to the fuel petcock?
Title: Re: Is this normal on carburetors?
Post by: trumpetguy on April 02, 2007, 07:42:18 PM
OR, you may have very bad balance between the carbs. 

I agree to check for the vacuum leak, but also do the same test with throttle wide open and see if the left slide moves.  If not, move it with your finger to see if it is stuck. 

If it's stuck, you have a problem and need to fix that.  If it's not stuck and doesn't move with throttle open, then you have a massive vacuum leak on that side somewhere (vacuum hose or carb boot to head leak).
Title: Re: Is this normal on carburetors?
Post by: Merkurio24 on April 02, 2007, 11:39:57 PM
Quote from: krypto35 on April 02, 2007, 07:02:03 PM
couldn't you have just asked "is it normal for the right slide to move when cranking while the left one sits still?"  :cookoo:  and to my knowledge, no - carbs are supposed to move in syncronization.  you may have a vacuum leak - is the vacuum hose attached from the left carb to the fuel petcock?

The vaccum hose is attached to the fuel petcock and left carburetor.
Title: Re: Is this normal on carburetors?
Post by: Merkurio24 on April 02, 2007, 11:43:53 PM
Quote from: trumpetguy on April 02, 2007, 07:42:18 PM
OR, you may have very bad balance between the carbs. 

I agree to check for the vacuum leak, but also do the same test with throttle wide open and see if the left slide moves.  If not, move it with your finger to see if it is stuck. 

If it's stuck, you have a problem and need to fix that.  If it's not stuck and doesn't move with throttle open, then you have a massive vacuum leak on that side somewhere (vacuum hose or carb boot to head leak).

I did oppen the throttle half and all the way, and the left slide moves freely. Here is another video of something I find even more F#^ked up!

http://www.youtube.com/watch?v=V5xqMTbSfeU
Title: Re: Is this normal on carburetors?
Post by: Willy Willy on April 03, 2007, 04:25:32 AM
+1 on vacuum leak. just spray some wd40 or carb cleaner around the carbs, petcock area while the bike is running. if idle changes in an area you just sprayed, thats where the leak is.
Title: Re: Is this normal on carburetors?
Post by: Wrecent_Wryder on April 03, 2007, 09:20:14 AM
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Title: Re: Is this normal on carburetors?
Post by: Merkurio24 on April 03, 2007, 12:03:17 PM
Quote from: Wrecent_Wryder on April 03, 2007, 09:20:14 AM
Quote from: Merkurio24 on April 02, 2007, 11:39:57 PM

The vaccum hose is attached to the fuel petcock and left carburetor.

Or right carburetor, depending on the year.


The bike is a '94.....
Title: Re: Is this normal on carburetors?
Post by: Egaeus on April 03, 2007, 03:49:26 PM
Check your fuel hoses.  There might be an obstruction.  Assuming you have a full tank, that is. 

The bike's running lean, even on ON. You need to figure out why.