Vintage Honda Carburetor Specifications
U.S. (and a Few Non-U.S.) Four- and Six-Cylinder
In-Line Models 1969-1983

Revised April 2013 (footnote)

Year Model Casting # Type Float Main Slow JN Note
72-74 CB350 Four   1 21mm 75 35 3
75-77 CB400F 054A 1 21 75 40 3
71-73 CB500 Four 627B 1 22 100 40 4
74-75 CB550K 022A 1 22 100 38 4
76 CB550K 087A 1 22 100 38 4
77 CB550K X46A 2 14.5 90 38 3
78 CB550K PD46C 2 12.5 90 42 NA
75-77 CB550F 069A 1 22 98 38 2
79 CB650 PD51A 1 12.5 92 35 NA
80 CB650   1 12.5 90 35 NA
81-82 CB650/C VB44A 4 15.5 120 35 NA
82 CB650SC VB44C 4 15.5 118 35 NA
69 CB750 NA 1 26 120 40 3
70-74 CB750K B750A & 7A 1 26 120 40 3
75 CB750K 657A 1 26 110 40 4
76 CB750K/F 657B & 086A 1 26 105 40 4
77 CB750K PD41A 2 12.5 115 35 1
78 CB750K PD42B 2 14.5 110 35 NA
79-81 CB750K/C VB42A 3 15.5 68/102 35 NA
79-81 CB750K/F VB52 3 15.5 68/102 35 NA Euro
82 CB750K VB42AG 3 15.5 68/102 35 NA
81 CB750C VB42A 3 15.5 68/102 35 NA
82 CB750C VB42G 3 15.5 68/102 35 NA
82-83 CB750SC VB42AG 3 15.5 68/102 35 NA
75 CB750F 064A 1 26 105 40 3
    1 26 105 40 4
76 CB750F 1 26 105 38 2
77 CB750F PD41B 2 14.5 105 35 2
78 CB750F PD42A 2 14.5 105 35 NA
79 CB750F VB42B 3 15.5 68/100 35 NA
80 CB750F VB42B 3 15.5 68/98 35 NA
81 CB750F VB42B 3 15.5 68/102 35 NA
82 CB750F VB42AG 3 15.5 68/102 35 NA
75-77 CB750A PD44A 2 14.5 102 38 3
78 CB750A PD43A 2 12.5 108 38 NA
80 CB900C VB43A 3 15.5 68/105 38 NA
81-82 CB900C VB43B 3 15.5 68/105 38 NA
81 CB900F VB43C 3 15.5 68/105 38 NA
82 CB900F VB43C 3 15.5 68/105 35 NA
83 CB1000C VB55A 3 15.5 68/110 35 NA
79 CBX VB60A 3 15.5 65/98 35 NA
80 CBX VB62A 4 15.5 110 35 NA
81-82 CBX VB64A 4 15.5 105 35 NA
83 CB1100F VB56A 4 15.5 122 38 NA

I assembled this table using official Honda specifications booklets when I first built this website way back in the 1990s. I was honest and sincere and worked hard in my transcription. Unfortunately, in the face of my own experience and the suggestions of others, it seems Honda was not so forthright. There are a number of errors. I am correcting them as I learn of them, and welcome suggestions.


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Mike Nixon