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Author Topic: 20-22 carb reading cb 750  (Read 1033 times)

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Offline neil10

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20-22 carb reading cb 750
« on: December 31, 2009, 12:24:17 PM »
20-22 carb  reading cb 750
Just wandering if reading are higher or lower what effect does that have?
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Offline mlinder

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Re: 20-22 carb reading cb 750
« Reply #1 on: December 31, 2009, 12:32:39 PM »
What?
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Offline myhondas

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Re: 20-22 carb reading cb 750
« Reply #2 on: December 31, 2009, 12:36:43 PM »
Huh?
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1974 CB 750 K4 SHOWROOM
1974 CB 750 K4 IN PART-OUT PROCESS (my original bike)
1965 C100 CUB 50 (PIT BIKE)
1996 VF 750 CD daily rider
1983 VF 1100 V65 Magna in restoration process
SOHC# 5105 11228

Offline neil10

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Re: 20-22 carb reading cb 750
« Reply #3 on: December 31, 2009, 12:42:10 PM »
standard carb readings are 20-22hmg if reading goes higher or lower what efect does that have on  bike
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Offline Gordon

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Re: 20-22 carb reading cb 750
« Reply #4 on: December 31, 2009, 12:48:31 PM »
Quote from: neil10 on December 31, 2009, 12:42:10 PM
standard carb readings are 20-22hmg if reading goes higher or lower what efect does that have on  bike

If it goes higher your idle speed is higher.  If it goes lower your idle speed is lower.  When synching carbs you're not looking at the actual reading, you're just setting them so they're all the same. 
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Offline mlinder

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Re: 20-22 carb reading cb 750
« Reply #5 on: December 31, 2009, 01:16:47 PM »
Oh, he's looking at the vacuum on a carb synch tool.

That's good to know.

As Gordon said, just work on getting them even, then adjust idle. Yer fine.
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Offline neil10

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Re: 20-22 carb reading cb 750
« Reply #6 on: January 01, 2010, 12:53:58 AM »
Does vaccum effect lean and rich
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Offline Gordon

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Re: 20-22 carb reading cb 750
« Reply #7 on: January 01, 2010, 11:27:56 AM »
Quote from: neil10 on January 01, 2010, 12:53:58 AM
Does vaccum effect lean and rich

No.  The vacuum reading only shows how much air is moving through the intake.  The amount of fuel that is mixed in with that air does not effect the reading. 
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