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Hi everybody, I recently bought a cx500 and needed a wiring diagram, I pulled a good one off this sight but it was black and white and hard to follow at some points. Since you all were nice enough to share it with me, I figured I'd share what I turned it into. It is in color (although not as great as others I have seen) so it should help follow lines. Honda CX500 Motorcycle 1978-1979 Complete Wiring Diagram-1.jpg
 

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do you know if this is the same for United States?
 

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It is not. UK models differ from North American ones in a few ways, the most obvious being the parking lights and headlight switch.

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 even if you have had it for a while 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. And while you are in the Wiki you can download both the original wiring drawing in Honda's style (which is also in the FSM) and the colour one in Clymer's style.

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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