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Author Topic: Is it an F2 or F3?  (Read 1998 times)

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Offline hapakev

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Is it an F2 or F3?
« on: March 02, 2009, 11:33:36 PM »
I've seen the/my 78 cb750f referred to as an F2 and an F3.  How do I tell the two apart? Which is correct?
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Smoking Jack
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Offline mick750F

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Re: Is it an F2 or F3?
« Reply #1 on: March 03, 2009, 05:17:50 AM »
   In the US a '77 750 Super Sport is an F2. The '78 model is an F3.

Mike
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upperlake04

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Re: Is it an F2 or F3?
« Reply #2 on: March 03, 2009, 05:30:41 AM »
1977 CB750F2
Model Year:   1977
Engine #:   CB750FE-2600004
Frame #:   CB750F-2100011

1978 CB750F3
Model Year:   1978
Engine #:   CB750FE-3100001
Frame #:   CB750F-2200001
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Offline NitroHunter

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Re: Is it an F2 or F3?
« Reply #3 on: March 03, 2009, 08:57:44 AM »
Hap, we've just been refering to both the '77 & '78 as F-2.
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Offline hapakev

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Re: Is it an F2 or F3?
« Reply #4 on: March 03, 2009, 09:19:08 AM »
Thank you for the clarification.  So, as far as parts are concerned, the F2 and F3 should be the same correct? I mean F2 parts will fit my F3? 
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Smoking Jack
1978 CB750F(ish)

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upperlake04

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Re: Is it an F2 or F3?
« Reply #5 on: March 03, 2009, 10:19:36 AM »
 The script on the side covers is different. F2 is upright, F3 slanted. Nothing else is different AFAIK. There are others here who know more. :)
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Offline scondon

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Re: Is it an F2 or F3?
« Reply #6 on: March 03, 2009, 10:28:16 AM »
There are a few cosmetic and mechanical differences, but they are of little consequence unless you intend a restoration. The easy answer is that F2 parts will fit your F3, no problems.
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Offline mick750F

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Re: Is it an F2 or F3?
« Reply #7 on: March 03, 2009, 11:04:10 AM »
Quote from: NitroHunter on March 03, 2009, 08:57:44 AM
Hap, we've just been refering to both the '77 & '78 as F-2.

We who? ??? ;)

   As has been posted they are basically the same. '77 carbs have adjustable clips where the '78's don't. The '78 has some emission "upgrades" not on the '77. The '78 has nicer side cover badges ;D ;D ;D. There might be something slightly different in the '78 top end but I'm not recalling it if there is. 

Mike
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upperlake04

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Re: Is it an F2 or F3?
« Reply #8 on: March 03, 2009, 12:34:12 PM »
Quote from: mick750F on March 03, 2009, 11:04:10 AM
  The '78 has nicer side cover badges ;D ;D ;D.
Mike

 That has always been unanimous here, even the F2 guys agree. ;D

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