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Author: Subject: Tacho wiring
voucht
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Building: Haynes roadster on the road since november 2014 bu

posted on 2/7/23 at 01:37 PM Reply With Quote
Tacho wiring

Hi,
Long story short, I finished my Café Racer from a Kawasaki ZX550 from 1984. Works well now, but I'm struggling setting up the number of pulses on the electronic tachometer to have the right rev displayed.
I have 4 cylinders.
I have 2 ignition coils, one for cylinder 1-4 and one for cylinders 2-3.
2 wires arrive on each coil : one earth (-), and one from the ignition contrôler (+).
The wire to the tacho which gives the rev signal comes from ignition cable (+) that goes to coil 1-4.
Should I set-up my electronic tachometer on 1 pulse, 2 pulses, or 4 pulses ?
Thank you.





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https://cafrazx550.blogspot.com/

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Prof_Cook

posted on 2/7/23 at 07:05 PM Reply With Quote
Found this page: https://www.kawasakiversys.com/threads/speed-tacho-signals.21391/

This page is for a Kawasaki, but not the ZX550? but for 650 and states;

"For the Tacho signal, the service manual refers that 133Hz will display 4000 RPM. Well, 4000 RPM is 66.6Hz hence, this signal might be 2 pulses per revolution.... "

So the answer appears to be "2".


[Edited on 2-7-23 by Prof_Cook]

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voucht
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Posts 232
Registered 22/5/11
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Building: Haynes roadster on the road since november 2014 bu

posted on 2/7/23 at 10:43 PM Reply With Quote
Thank you for your answer.
Though, Kawasaki 650 Versys is a twin, not a 4-cylinders (I know, I used to own one )
So I'm not sure I can rely on this.
Thank you.





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https://cafrazx550.blogspot.com/

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