1980 GS1000ET carb setting question

[Anonymous]

Hi there,

I bought a 1980 GS1000ET and the carbs needed some work. So the mechanic working on the carbs cleaned them, blew the jets and checked the diaphrams. He doesn't have a manual for the bike so he doesn't know the stock settings. How many truns for the pilots screws? He thinks he needs to wind back 1.5 times but not sure.

Any help would be much appreciated. I'm not very mechanically inclined so you'll have to bare with me here. The person working on the bike doesn't even have a pc so here I am posing the question on his behalf. If you need more info, please let me know.

Gerry

[KEITH KRAUSE]

If everything else has been done correctly, adjust your mixture screws to achieve the highest rpm.
Place the bike on the centerstand, warm it up completely/hot.
Set idle to about 1,000/1,100 rpm's by adjusting the idle adjuster knob.
Starting with any carb, slowly turn the mixture screw in either direction until you hear the rpm's max. Fine tune the setting. Now re-adjust the idle down to 1,000/1,100 with the idle adjuster knob.
Repeat this to the other 3 carbs.
The screws will generally be between 1 1/4 to 2 turns out on a stock motor. If they end up much less or much more, then you have pilot circuit mixture problems.

[petermatra]

Carburetor tuning

I am confused on which screw is which. And which order to do things.
Can someone please help?

My bike will not idle unless its in middle choke.

1) Do I adjust the idle screws until I can get it to idle without the choke? and then fine tune the idle further?

2) Where are the idle screws? I am assuming they are different than the 3 throttle adjustment screws and air screws.

thanks

[KEITH KRAUSE]

Screw locations and if you have separate pilot air/fuel screws or mixture screws only, depends on what year/model you have.

[petermatra]

screw loactions on 1982 GS850L

Yeah I just realized I never put my bike on my post! Duh

my 1982 GS850L is running lean and will only run on half choke. I want to adjust the mixture screws but am always retiscesnt on messing with thing I have little knowledge about.

The only 4 screws I see are needles with springs and an o-ring just before the carbs go into the carb boots. Is that the correct screw?

Thanks

[KEITH KRAUSE]

Re: screw loactions on 1982 GS850L

Yeah I just realized I never put my bike on my post! Duh

my 1982 GS850L is running lean and will only run on half choke. I want to adjust the mixture screws but am always retiscesnt on messing with thing I have little knowledge about.

The only 4 screws I see are needles with springs and an o-ring just before the carbs go into the carb boots. Is that the correct screw?

Thanks

Sounds like the mixture screws. Just before the carb boots, engine side, directly on top. Turning them out will richen the mixture. If your bike has a stock intake follow my first post to this topic. Record where your screws are so you can set them back if you want. You could also have a dirty pilot circuit, etc, but try the screw adjustment first. Let us know if it works.

[petermatra]

screwed

hey thanks for the replies

Im working on her today!