Common questions

How do you wire a tach on a motorcycle?

How do you wire a tach on a motorcycle?

How to Wire a Motorcycle Tachometer

  1. Remove the tachometer from the packaging.
  2. Use the included hardware to attach the tachometer to the handlebars of your motorcycle.
  3. Run the receptor and ground wires down the handlebars and frame of the motorcycle to the engine, near where the spark plugs connect to the cylinder head.

Can a tach be connected to a HEI distributor?

I may be wrong, but I don’t think an HEI distributor is going to trigger a tach designed for a point system. You will have to find out the make of the distributor and where the tach should be connected. I believe it is the grounding wire from the coil.

What kind of wire do I need to hook up my tachometer?

Use the SIG 1 (In-Dash Tach) or purple wire (Pedestal Mount Tach) input (see “Signal Hookup” in the instructions). If you have a modern ignition system and your ECU (computer) has a dedicated 12V tachometer signal output you can use this to drive the tachometer.

Where to find the tach signal on a tachometer?

Verify you are using a proper signal source. The most common locations for a tach signal are the negative terminal of the ignition coil or tachometer output terminal (HEI, Ignition Control Boxes or ECU). Verify 12V ACC, signal and ground connections (see above).

Can a Hei filter be used on a tachometer?

If you have an HEI distributor with a “Tach Output” you can use the “Tach Output” from the distributor. Due to the high voltage of the signal from the HEI you should use a tachometer filter to prevent damage to the tachometer.

I may be wrong, but I don’t think an HEI distributor is going to trigger a tach designed for a point system. You will have to find out the make of the distributor and where the tach should be connected. I believe it is the grounding wire from the coil.

Use the SIG 1 (In-Dash Tach) or purple wire (Pedestal Mount Tach) input (see “Signal Hookup” in the instructions). If you have a modern ignition system and your ECU (computer) has a dedicated 12V tachometer signal output you can use this to drive the tachometer.

Verify you are using a proper signal source. The most common locations for a tach signal are the negative terminal of the ignition coil or tachometer output terminal (HEI, Ignition Control Boxes or ECU). Verify 12V ACC, signal and ground connections (see above).

If you have an HEI distributor with a “Tach Output” you can use the “Tach Output” from the distributor. Due to the high voltage of the signal from the HEI you should use a tachometer filter to prevent damage to the tachometer.

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Ruth Doyle