1980 GS850G carb Question

[Kato76]

I just got a 1980 GS850G I looks great and the only thing wrong with it is there was a carb adjusting problem. The Gentalman who own the bike before me adjusted something on the Carbs and well its just not running right now. I need to figure out how to balance/tune the carbs so I can ride this beauty.

Any help would be appreciated

Thanks

[Steve]

First of all, how long ago did it run? Chances are, if it has not run for a couple of months or more, you need to start with cleaning the carbs before you worry about balancing them. After cleaning, a balance will be necessary, but make sure they are clean first.

Here is a link to the series on how to properly clean the carbs.


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[mark]

Right, also in order to have an accurate sychronization, make sure your valves are correctly adjusted.

Also the same old stuff. Your airbox (assuming your bike is stock) needs to be perfectly sealed, intake 0-rings good, petcock working correctly, etc.

[Kato76]

Ok I got the down low on what had happened to the Carbs in the first place...
the bike was running fine until the previous owner turn 1 screw on 1 carb then the bike backfired and shut off. So I'm guessing this is the air screw that he turned. So my attempt is to find out what screw it was and then turn it back

:-)

[mark]

Assuming that its one these screws:

http://www.thegsresources.com/images/carbs/007_AIR%20SCREW%20LOCATION.jpg

something you could do would be to carefully count the number of turns each screw takes to be lightly seated. One of them is probably way off. Match the one that's out of whack with the other two to give you at least a preliminary setting.

[Steve]

Match the one that's out of whack with the other two to give you at least a preliminary setting.

Uhhh...most of the 850s that I have seen had FOUR cylinders,
so find the one that is out of whack and adjust to match the other THREE.


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[Kato76]

Yeah the gentalman said it was a screw on top of the carb so I'm guessing it was an air screw.. what he also said is that the screw is a little tore up so I'll be able to tell which one it is.... I'll keep you posted..

[mark]

Uhhh...most of the 850s that I have seen had FOUR cylinders,
so find the one that is out of whack and adjust to match the other THREE.


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Guess we figured out which one is out of whack.

[Kato76]

So I had it running this weekend actually got to ride it .. almost took it around the block .. but then I ran out of gas haha so now all is left to do is balance the carbs...

thanks for all the info

[chef1366]

Gas is good. ;-)