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Cx500c
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Discussion Starter #1
hi is there anyone who could help me identify these carburetors? they are on a cx500c 1980. but I bought a kitt to renovate them and some parts do not fit in the kitt, so now I wonder what year model the carburetors come from
206410
 

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1982 CX500C (US)
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78 Posts
What parts don't fit?

VB37A looks to be from a European 82 Custom or an 81 GL500 if the Motofaction page is remotely right, but I don't see an accelerator pump on it, maybe that's a North America thing.


And various references on the forums here seem to list VB37A-D as a common variant.
 

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The bulging style ACV covers are early. Given the blank fuel inlet they have the fuel inlet between the carbs on the fuel crossover meaning they are CX500 C carbs.

I would guess 79 but could also be correct and original for your 80.

I think too early to be euro.

To repeat Unstas question - which parts don't fit?

I'm guessing float needle and idle jet.
 

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Discussion Starter #4
Hello thanks for the information, yes it is the
Air cut off valve set, and the slide needle the seams to be short.
 

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That's strange, but OK. You are better off not using any of the brass from the kit unless the kit is genuine keihin or your existing parts are actually damaged. Ditto the float needle.

I mostly only ever replace the float bowl gaskets, O rings, ACVs and the accel pump parts if fitted.

If not keihin the brass is probably substandard as are the float needles.
 

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BTW: Welcome to the forum. Please add your location to your profile and your bike's model and model year to your signature so that you don't have to remember to tell us every time and we don't have to keep asking when you forget (see Forum Settings link in my signature).

And welcome to the world of antique vehicle ownership (they own us, not the other way around). Your bike is about 4 decades old and the Previous Owners may or may not have done the maintenance necessary to keep it safe & reliable so it is highly recommended to download the Factory Shop Manual for your model (available through the CX Wiki - link in my signature) and go through all of the service procedures, regardless of whether your bike has reached the specified mileage.
I also recommend looking on all rubber parts with suspicion because rubber does not age gracefully. Check the date codes on your tires and replace them if they are over 5 years old no matter how good they look & feel (old rubber simply cannot flow around the irregularities in the asphalt well enough to grip, especially if it is cool or wet). If your bike still has the original rubber brake line(s) (should be replaced every 2 or 3 fluid changes = 5 or 6 years) I recommend shopping for modern stainless braided ones (they last practically forever and double the life of the fluid). And don't forget things like the rad hoses and the boot between the engine and swingarm (they can crack on the bottom where you don't see it)
 
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