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Post by Deleted on Nov 23, 2015 21:47:51 GMT
Has anyone ever stopped to think what the difference is with these carbs (if any) ?
My early (1978) CB400N has VB31-B carbs with an 'A' identifier in the little box - I am assuming these are the carbs that it left the factory with.
Can anyone shed more light? CMSNL looks a tad confusing on this (again).
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Post by wazzbo on Nov 23, 2015 21:53:47 GMT
My 400na has vb31-b fitted Nick  |
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Post by Deleted on Nov 23, 2015 21:58:03 GMT
Same as mine on my CB400NA - although these were sourced from Germany and also carry the A serial in the box (guessing they are from a kicker). Th originals were B serial on my CB400NA.......but still VB31-B.
Will be interesting to check out my NOS ones at the weekend to see what they show.
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Post by Deleted on Nov 23, 2015 22:00:25 GMT
After closer inspection it looks as if all 400 SD carbs should be VB31-B.
The Haynes manual states VB31-A for earlier models - I think this is an error.
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Post by Deleted on Nov 23, 2015 22:25:22 GMT
Yes they are all VB31B for the 400, then either A or B in the box. Cmsl and Haynes seem to be quite useless on some of this.
Quick look and the only difference in the original Honda lists between the two types are the vacuum top and piston. Would be interesting to compare and see what changed....
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Post by wazzbo on Nov 23, 2015 23:05:07 GMT
I have another set of VB31B in stock I`ll have a look tomorrow and see what they are.
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Post by Deleted on Nov 24, 2015 8:42:06 GMT
There are also C and D serial. Latest I've seen is D but would not be surprised if they went to E and F on the CB400NC / ND.
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