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Air Screw Adjustment 1979 GS750L

  • Thread starter Thread starter br1amb
  • Start date Start date
B

br1amb

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Hi guys,

I am rebuilding the carbs on my 79 GS750 L. I set the float levels at 27mm per my manual.

It doesn't say anything about air screw adjustment. I am guessing the air screws are located on the bottom of the bowl. Anyone know how many turns out?

What about he screws on the outside of the carbs. Anyone know how many turns out? What are they called?

Thanks for all your help,

Al
 
I strongly suggest you read the VM carb rebuild series linked here http://www.thegsresources.com/files/vm_carb_rebuild.pdf

Float height should be 24mm not 27mm.

Also, there are two adjustments you need to make; fuel screw and air screw. The instructions give you good starting points.

Replacing the various o-rings is strongly recommended as well if you have not already done so. http://cycleorings.com/

Good luck.
 
Last edited:
Float Level

Float Level

Thank you for posting that is a huge help. :-D

Are you sure about the float level of 24mm when i set them that low they don't look right. The adjustment tabs are sticking way out like 2 - 3mm above the float frame. With the carbs tipped upside down.

At 27mm the tab is about = to the float frame height.

How sure are you about 24mm float height on a 79 GS750L?

The manual from a 76 GS750 says to set the float height from 25mm 27mm

Thanks for your input
 
Thanks again for your input. I am going to repost this under the proper heading.
 
br1amb said:
Thank you for posting that is a huge help. :-D

Are you sure about the float level of 24mm when i set them that low they don't look right. The adjustment tabs are sticking way out like 2 - 3mm above the float frame. With the carbs tipped upside down.

At 27mm the tab is about = to the float frame height.

How sure are you about 24mm float height on a 79 GS750L?

The manual from a 76 GS750 says to set the float height from 25mm 27mm

Thanks for your input
Click to expand...



Sorry for the confusion. I made a mistake. You are correct.:oops:

floatheight.jpg
 
Not sure there is a "correct" setting. I set my VM 550 carbs to 1 turn on fuel and 1-3/4 on air and it runs great.
 
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