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Hey everyone! I’m 23 and my 1979 cx500D is my first bike so I don’t have much experience with diagnosing mechanical issues. However I did rebuild the left head a month ago because I broke off an exhaust stud trying to replace the rear crank case cover.
When I had it apart I didn’t mess with any settings on the carbs or anything.
It’s always had a throttle issue, I have to baby it really slowly from 1k RPM to 5k or it’ll bog down and have no acceleration but takes off after 5k.

After I rebuilt, it ran on first start and idled fine, rode just like before but a day ago just started dying almost every time I roll to a stop unless I pull the choke fast. It has also been backfiring a lot.
I’m also trying to replace the turn signal/horn switches with one I bought off Amazon so half of those wires have been cut and are hanging cause it’s very confusing to me.
Right now I just want to figure out why it keeps dying.
 

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It’s always had a throttle issue, I have to baby it really slowly from 1k RPM to 5k or it’ll bog down and have no acceleration but takes off after 5k.
This sounds like a failing low speed coil in the stator. Measure the resistances as shown here.
 

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1978 CX500 "The Grub", 1983 GL650I "Nimbus"
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Where are you, Matt? If you happen to be in the Twin Cities area, I can help you out.
By the way, you shouldn't have cut any wires. All that stuff unplugs.
 

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'84 CX650E that is evolving into a GL500
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I don't have answers for your current issues but welcome to the forum. Please add your location and your bike's model and model year to your profile 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 may or may not have had all of 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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