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99 FXD Speedo goin nuts

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Old Jan 28, 2018 | 09:14 AM
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Default 99 FXD Speedo goin nuts

So, recently my dyna's speedo has been spazzing out. The engine light will come on, the speedo will stop working, the odometer will go off, and finally engine light will go off too. When i pull in the clutch it will go back to normal, until i start going again. I have recently replaced the stator. Any ideas?
thanks!
AJ
 
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Old Jan 28, 2018 | 09:24 AM
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Electronic speed sensor. When these go out the speedo will stop working and then come back on. On efi bike's, the bike's wont idle right
 
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Old Jan 28, 2018 | 09:28 AM
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Originally Posted by misfitJason
Electronic speed sensor. When these go out the speedo will stop working and then come back on. On efi bike's, the bike's wont idle right
Thanks! Ive heard something similar to that, isnt there a way they can be cleaned? Also, do you know where its located?
 
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Old Jan 28, 2018 | 10:28 AM
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**Update, i found and cleaned the sensor. No change. I also found that it dies the same thing while in nuetral by just revving it. Could it still be the sensor?
 
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Old Jan 28, 2018 | 11:10 AM
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Is your bike carb? But yes the sensor could be bad. They tend to go out and they are fairly inexpensive and easy to change.
 
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Old Jan 28, 2018 | 11:10 AM
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It is carb.
 
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Old Jan 28, 2018 | 11:23 AM
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If it was a carb issue it wouldn't trigger your speedo. If it was the temp sensor it wouldn't trigger your speedo. That leads me to believe it's your speed sensor or cam position sensor. Another stupid thing that produce similar results is if you spark plug wires are loose and not fully seated. They can become loose when you wash your bike. What would be helpful it to see what the code that your bike threw to turn on your check engine light.

Figure that out and you have your culprit.

If you have an iPhone or iPad download this app to help you
99 FXD Speedo goin nuts-photo377.jpg
 

Last edited by misfitJason; Jan 28, 2018 at 12:38 PM.
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Old Jan 28, 2018 | 12:15 PM
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Had a '99 Sportster do the same. The battery cable to the starter was corroded more than half through under the insulation, check those cables real good. Ground cables also.
 
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Old Apr 19, 2018 | 08:56 AM
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*** So, update, I did finally replace the speed sensor, and there was no change to the issue. I found out how to get to the "Trouble Codes" on the bike last night, and I will be going through to try to figure out what's going on. I will also check those cables, and download the app. Thanks!! ***
 
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Old Apr 19, 2018 | 03:37 PM
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Look for a pinched wire in the handlebars...My bike had one and had most of the symptoms you describe. Started not too long after a bar change.
 
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