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Discussion Starter · #1 ·
Ive seen this mentioned elsewhere on this forum but was unable to get a definitive answer. The attached photo shows the two air/mixture screws from the carbs of my '73 CB450. None of the kits available online offer different screws so Im wondering if they need to/are supposed to be different? If they should be different, which one is for which side? The parts diagram does not seem to indicate two different screws either.

Reference similar issue: http://www.hondatwins.net/forums/56...28-different-air-screw-my-72-cb450-carbs.html

Wood Screw Hardwood Plywood Fastener

Thanks for the help!
k.
 

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Discussion Starter · #3 · (Edited)
They are not the same: 14H & 723A. Does this mean someone replaced one with a different type? Is it possible to get two different carbs on the same bike to run properly?
 

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They are different carbs for the same bike.
The 14H comes with 130 main jet and the 723A comes with a 145 main

http://www.hondatwins.net/forums/54-manuals-technical-documents/13164-cb-cl450-cb500t-service-specifications.html
 

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In your photo, the screw on the right is for a 14H carb. The one on the left is for the 7xx series carbs-it also uses an o-ring and little washer, which the older type does not use.
They do NOT interchange, and may damage the carb..
14H carbs were used through K4, for the most part, so if you look for a "carb kit", get the ones listed for 1969-1971 models, if you have 14 H carbs.

The carb type is stamped into the carb body, on the "end" facing the air cleaner.
It would be unlikely that you could get mismatched carbs to run very well.
 
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