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Author Topic: CB750a Carb question  (Read 2806 times)

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Hambone

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CB750a Carb question
« on: June 15, 2009, 04:51:27 PM »
I'm getting ready to rebuild my 1977 CB750a carbs and had a couple of questions. I think the standard carbs on the f and k models are 28mm and the a are 24mm. Has anyone with an a model added pod air filters? Since the center bore is different can I assume the pod is also? The bike has a pipe on it, if I add the pods any idea on what I should do as far as jetting?
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Hambone

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Re: CB750a Carb question
« Reply #1 on: June 16, 2009, 12:57:01 PM »
Anyone have any ideas?
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Offline Inkscars

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Re: CB750a Carb question
« Reply #2 on: June 16, 2009, 01:10:21 PM »
Yours is a hondamatic?
Does it have PD carbs on it or the old style?
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81 Hardly Davisson

Offline Spanner 1

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Re: CB750a Carb question
« Reply #3 on: June 16, 2009, 01:49:20 PM »
Yep, you have 24mm PD type carbs....pods to fit would be smaller diameter than K or F pods ( 28mm ). Stock main jets are 102's on your bike, with 4into1 exhaust and pods, I'd try 105 or 110 main jets......trial and error really.......
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If your sure it's a carb problem; it's ignition,
If your sure it's an ignition problem; it's carbs....

Hambone

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Re: CB750a Carb question
« Reply #4 on: June 16, 2009, 03:31:54 PM »
Spanner, Thanks so much. Is there a place on my carbs I can measure, so I can order pods that fit? i.e. does the pod need to have a 24mm opening or is that the venturi opening on the carb?
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Offline Spanner 1

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Re: CB750a Carb question
« Reply #5 on: June 16, 2009, 05:58:30 PM »
As far as I know they would just be 24mm pods, i.e. they are sized to fit 24mm venturi.
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If your sure it's a carb problem; it's ignition,
If your sure it's an ignition problem; it's carbs....
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