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Idle mix adjustment on an '83 750???

tkent02

tkent02

Forum LongTimer
Past Site Supporter
1983 GS 750E - I see no external screws, but this sucker is idling way too rich, has very stinky exhaust. Probably has been jetted as it has a Yoshimura pipe and it is running great except for the idle.
I will find a shop manual at some point and tear into it more but for now is there a hidden idle adjustment on these carbs?
 
Last edited:
There are several models of the 83 750. You don't say what model. Check out the parts Fische for Suzuki at

flatoutmotorcycles.com

You can look at the exploded views of the various carburetors for the 750's and perhaps locate the adjustment screw you are looking for.

Good Luck
 
E model...

E model...

Been through all the pics, no adjustment screw that I can find.
 
That picture is where they are on an '83. If the plugs are still there, (because you don't see them yet that is probably the case) Take a small drillbit (5/32) and drill a hole in the plug. Be careful not to drill into the screwhead that is under the plug (it is only about an 1/8 thick) Then use a sheet metal screw as a puller. Plug will pull right out.
 
As others said, the mixture screws may still be capped. If still capped, it's doubtful they've been disturbed and they wouldn't move on their own. But you can still record where there are currently. Then adjust them using the highest rpm method and see if it helps what you say is a rich idle. If you don't like the results you can always return them to the recorded settings and try something else.
 
The caps are right next to the intake on top of the carbs. You'll see a circular type piece with a small hole in the center. If you can't get the idle to lean out I'd suggest pulling your carbs and see what size pilot jets you have installed. While you have them off clean and rebuild them also.
 
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