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Old 04-23-2012, 02:18 AM   #1
Padmei OP
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O ring needed for mixture screw???

Hi all.
My LHS mixture screw (36mm bings off R80GS) is missing a spring. What purpose does this spring serve?
Also in the bing book an O ring is shown between the spring & screw. I am unsure if mine had them originally - should they have? I am chasing down a revs getting hung up problem & trying to eliminate problems.
Cheers
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Old 04-23-2012, 02:48 AM   #2
Pete-NZ
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Quote:
Originally Posted by Padmei View Post
Hi all.
My LHS mixture screw (36mm bings off R80GS) is missing a spring. What purpose does this spring serve?
Also in the bing book an O ring is shown between the spring & screw. I am unsure if mine had them originally - should they have? I am chasing down a revs getting hung up problem & trying to eliminate problems.
Cheers
The spring stops the screw vibrateing out by keeping preasure on the thread..
there most lightly was a 0-ring...
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Old 04-23-2012, 02:54 AM   #3
lockyv7
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I only just rode a 100GS home on the weekend and it has a revs hung up problem, when it gets hot it wants to idle really high sometimes, i was thinking it was in the bean can, maybe the weights advance staying on or something like that.
I am sure someone will be along shortly to either give me or you an answer.
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Old 04-23-2012, 03:30 AM   #4
Voltaire
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As mentioned the spring and o ring stop the screw working loose and sealing at the same time.
Idle slow to drop is often due to air leaks, may be time to replace the carb/head rubber.
Throttle cable not letting the butterfly valve close....throttle shaft worn/leaking.....
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Old 04-23-2012, 06:09 AM   #5
Wirespokes
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Adjust the carbs when they're fully warmed. When the idle is high, that's the time to adjust and synch them. Most likely, that will cure the situation.
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Old 04-23-2012, 07:42 AM   #6
boxerboy81
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Quote:
Originally Posted by lockyv7 View Post
I only just rode a 100GS home on the weekend and it has a revs hung up problem, when it gets hot it wants to idle really high sometimes, i was thinking it was in the bean can, maybe the weights advance staying on or something like that.
I am sure someone will be along shortly to either give me or you an answer.
Ride it for 20-30 minutes, then tune the carbs. Tuning when not warm enough will cause a high idle.
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Old 04-23-2012, 12:35 PM   #7
Padmei OP
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Just to confirm with those of you that have the same carbs - is there def is a small o ring that sits on the smooth shaft between the thread & the point & not just the one that sits at the end in its' own recess?
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Old 04-23-2012, 01:17 PM   #8
Box'a'bits
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Nope, just sits in a recess near the threads.

Does that book cover multiple Bing carbs, or just your model? The carbs are 32mm btw.

Put up a photo if you're still not sure
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