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Magneto Tach Adapte...
 

Magneto Tach Adapter/Convertor

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(@r-horn)
Posts: 28
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For the CDI bike I have wired up a MSD 8918 Tach Signal Pickup and a Smart Fun Optocoupler which works grate.

I also have a bike with a Morris G5 magneto I would like a clean RPM from. I see "Auto Meter 9118 Tachometer Magneto Signal Converter" which I assume is a 12V out and I could run that into the Smart Fun Optocoupler.

Wondering if you could suggest a circuit DIY to pump the Magneto kill stud signal though that I could connect to the Smart Fun Optocoupler.


 
Posted : 14/04/2026 12:18 pm
(@r-horn)
Posts: 28
Member
Topic starter
 

ChatGPT came up with this and I likely have the parts. my assumption would be take the tach signal and a common ground and run that into the optocoupler with the optocoupler feeding back from the 5 volt source?

 


 
Posted : 14/04/2026 1:05 pm
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