82 KZ750-M CSR Koso TNT-01 Guage Nightmare

This guage has always been jumpy but since updating my ignition with the Dynatek mod for my big twin, the tach is very erratic and inaccurate even at idle.

We have tried wiring it six ways from Sunday and the guage settings are correct. I sent it back to Koso in Québec to possibly warranty it but they're saying it's bench testing correctly.

Now they're saying to get the signal from one of the three yellow wires coming off the regulator/rectifier. Wish they had put that in their instructions or told me to try that before I sent the unit across the continent.

Does anyone have experience with this particular guage or manufacturer or had a similar they could only solve by getting the signal from the suggest location?

Got the same nightmare like you (KOSO RX2N+). Solved the Problem with an ABS Signal converter.

kzrider.com/forum/4-electrical/607690-de...eter?start=20#784802

Where do I get that piece of equipment and how do I wire it in? Where do I get the RPM signal if I'm using that piece?

You can order here:

www.zmm-electronic.de/ignition-signal-ch...:44.html?language=en

Products description Ignition voltage converter

This module converts the firing signal of the terminal 1 to the ignition coil in a 12 volt square signal. (For ignition signal transducer)

It is suitable for driving an electronic tachometer with a conventional ignition signal of an ignition coil terminal 1.

Technical details:

Size: 50 x 38 x 14 mm
Supply voltage: 9 to 15 volts
Input signal: ignition voltage terminal 1 (ignition primary circuit)
Output: 12 volt square wave (each ignition pulse)

Any source stateside or no?

It´s a made in Germany only, no oversea source knowing, sorry you have to bit the bullet.