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High Idle

  • Thread starter Thread starter Drainspider
  • Start date Start date
D

Drainspider

Guest
Bike is a 1983 GS550 with siamesed carbs.

Carbs are cleaned. Intake boot o-rings are brand new.
Air box is sealed up and filter is brand new oem.
I am missing a couple of clamps for the boots from the airbox to the carb intake.
The bike idles at 5000 rpm.
Are the missing clamps enough to cause this? I know they need to be replaced but is there more that I should be looking at with an idle this high?

thanks,
Jon
 
Is the idle adjustment knob having any effect on lowering it? 5K sounds awful high for a vacuum leak to me. If you havn't tried already try backing out the idle adjuster.
 
Greetings and Salutations!!

Greetings and Salutations!!

Hi Mr. Drainspider,

Well, any air leak will wreak havoc with carb tuning. The stock setup wants to see a specifically metered air intake. There is a little wiggle room. But any excess can lead to high idle, stumbling, surging, difficulty in synchronizing, etc.

Anyway, let me dump a TON if information on you and share some GS lovin'. :D

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

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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
 
Idle idjust knob dropped the idle. Now it only hangs if reved up to about 4000.
Will fix the clamps etc.
thanks
Jon
 
HMM ok you need to assure that all intakes have the same vacuum and one side of the carb rack sucking air at a joint past the filter is going to wreak havoc.

Get the clamps. No a zip tie will not work.
 
Are your cables routed correctly, with enough freeplay?
+1 on the possibility of an air leak, too.
 
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