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Author Topic: 1981 cb650 carb unknown vacuum tube  (Read 537 times)

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Offline sam0917

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1981 cb650 carb unknown vacuum tube
« on: October 25, 2017, 04:06:04 PM »
Does anyone know what that black tube on top of the carb connects to? Cannot find it in any manuals. Thank you
« Last Edit: October 25, 2017, 07:33:34 PM by sam0917 »
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Offline Killer Canary

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Re: 1981 cb650 carb unknown tube
« Reply #1 on: October 25, 2017, 04:24:06 PM »
Looks like the breather for the vacuum switch.
Route it back and down to behind the swingarm pivot.
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Offline sam0917

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Re: 1981 cb650 carb unknown tube
« Reply #2 on: October 25, 2017, 06:32:35 PM »
Would it hang free or is there somewhere to insert it on the other end?
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Offline cb650

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Re: 1981 cb650 carb unknown vacuum tube
« Reply #3 on: October 26, 2017, 03:20:47 AM »
most of the vent tubes go between the back of the tranny/motor and the front of the swing arm.     
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