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tachometer hookup
Posted: Mon Sep 22, 2008 5:07 pm
by gearhead65
Does anyone know if there is a place on the bike where I can tap off to get a tachometer signal from?
Posted: Tue Sep 23, 2008 1:53 am
by mattb
That depends on whether the tach is purely mechanical or not (I presume you meant an electrical signal)! Is there any electrical wiring going to your tach?
Posted: Tue Sep 23, 2008 4:51 am
by gearhead65
Yes, electrical. I am not very familiar with motorcycles, but with cars I am pretty proficient. On a car the tach signal is usually taken from the coil or from a pin on the computer of a newer model car. Is there a coil on the motorcycle I can tap this signal from?
I have never dealt with a mechanical tachometer, so I really wouldn't know how that would hook up. I imagine it would be a lot more complicated though.
Posted: Tue Sep 23, 2008 11:36 am
by mydlyfkryzis
Yes, there's a coil.
However, you need to make sure the Tach is compatible with your bike. Some bikes are 1 spark per 2 revolutions, some are 2 sparks. they are usually referred to as single fire or dual fire.
My Honda NH 750 has 2 coils. for 4 cylinders. 2 plugs get a spark at the same time. So I have a dual fire system.
If you have a 2 cylinder, with 1 coil, then you are dual fire. If you have 2 independent coild, one for each cylinder, you have single fire.