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Idles perfect at 1100rpm but.....

  • Thread starter Thread starter MiloBramble
  • Start date Start date
M

MiloBramble

Guest
(1980 GS 850L) re-built and cleaned cards (dipped), sealed the air box, new boots from air box to carbs

....when I twist the throttle is sputters at about 2500-3500. I can keep twisting past the sputter every once in a while and it will get up to around 5000rpm and sounds clean but then when I let off it will idle at 1100 then sputter if I go up again. I have read tons of threads on this forum but nothing specific like this. It idled high earlier but I fixed a hung up spring in carb 1 and sealed my air box like suggested in another thread, now it idles great. Any ideas about the sputtering?

Thanks in advance for the advice.

mark
 
Sounds like you're a touch rich on the idle air adjustment screws if it's stumbling just off idle.

Try turning each of them in about an eighth of a turn, it doesn't take much to effect a change. :)
 
Larry D said:
Sounds like you're a touch rich on the idle air adjustment screws if it's stumbling just off idle.

Try turning each of them in about an eighth of a turn, it doesn't take much to effect a change. :)
Click to expand...

Will do thanks...will let you know how it turns out.
 
What happens if you "blip" the throttle ? Does it settle to idle nicely or does it drop lower than 1100 rpm and then catch up ? If it does, you're a bit rich. If it takes awhile for it to settle down to an idle or "hangs", then you're a bit lean. A good carb sync may help too.

I used to carry a small jeweler's screwdriver and adjust them to get the best off idle results. It took about 3 or 4 rides until I got it sorted. :)
 
Larry D said:
What happens if you "blip" the throttle ? Does it settle to idle nicely or does it drop lower than 1100 rpm and then catch up ? If it does, you're a bit rich. If it takes awhile for it to settle down to an idle or "hangs", then you're a bit lean. A good carb sync may help too.

I used to carry a small jeweler's screwdriver and adjust them to get the best off idle results. It took about 3 or 4 rides until I got it sorted. :)
Click to expand...

It settles pretty quickly but it is sluggish as I "blip" it.

Plus, I have been looking but cannot find,,,,which one is the idle air adjustment screw? Never mind,,,found them.
 
Last edited:
Top front

You did pull that out when you dipped your carbs?
 
ok, it seems to be getting better as I turn the screws clockwise but I am getting some popping (backfire) as I let off the throttle.
 
Greetings and Salutations!!

Greetings and Salutations!!

Hi Mr. Mark Stevens,

Here's the scoop. I'm going to share some GS lovin'. :D

I just stopped by to welcome you to the forum in my own, special way.
big_hi.gif


If there's anything you'd like to know about the Suzuki GS model bikes, and most others actually, you've come to the right place. There's a lot of knowledge and experience here in the community. Come on in and let me say "HOoooowwwDY!"....
hat1.gif


Here is your very own magical, mystical, mythical, mind-expanding "mega-welcome". Please take notice of the "Top 10 Common Issues", "Top 15 Tips For GS Happiness", the Carb Rebuild Series, and the Stator Papers. All of these tasks must be addressed in order to have a safe, reliable machine. Now let me roll out the welcome mat for you...

carpet.jpg


Please click here for your mega-welcome, chock full of tips, suggestions, links to vendors, and other information. Then feel free to visit my little BikeCliff website where I've been collecting the wisdom of this generous community. Don't forget, we like pictures! Not you, your bike! :D

Thanks for joining us. Keep us informed.

Thank you for your indulgence,

BassCliff
 
BassCliff said:
Hi Mr. Mark Stevens,

Here's the scoop. I'm going to share some GS lovin'. :D

I just stopped by to welcome you to the forum in my own, special way.
big_hi.gif


If there's anything you'd like to know about the Suzuki GS model bikes, and most others actually, you've come to the right place. There's a lot of knowledge and experience here in the community. Come on in and let me say "HOoooowwwDY!"....
hat1.gif


Here is your very own magical, mystical, mythical, mind-expanding "mega-welcome". Please take notice of the "Top 10 Common Issues", "Top 15 Tips For GS Happiness", the Carb Rebuild Series, and the Stator Papers. All of these tasks must be addressed in order to have a safe, reliable machine. Now let me roll out the welcome mat for you...

carpet.jpg


Please click here for your mega-welcome, chock full of tips, suggestions, links to vendors, and other information. Then feel free to visit my little BikeCliff website where I've been collecting the wisdom of this generous community. Don't forget, we like pictures! Not you, your bike! :D

Thanks for joining us. Keep us informed.

Thank you for your indulgence,

BassCliff
Click to expand...

Hey BassCliff,

thanks for the welcome and I have used this site and your website extensively during my re-build....thanks
 
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