Topic: Accurate Tach With 50 RPM Graduations

[Little_Phil]

No one here would happen to know how this gets hooked up, would they?

The green and black on the left gets me to measure voltage from the battery. Black negative, green positive. There is no manual on the internet for this.

Connections from back of pack found on net.

[DaveBarbier]

No one here would happen to know how this gets hooked up, would they?

The green and black on the left gets me to measure voltage from the battery. Black negative, green positive. There is no manual on the internet for this.

Connections from back of pack found on net.

Wow, where did you find this? You rock, I’ll try this out this morning.

[DaveBarbier]

Oh I just found it on eBay. This must have just gone up, I’ve been searching eBay the past couple days. Awesome, thanks again

[70CB750]

Over the summer I picked up a Tach/Dwell/Voltmeter just like this photo but a few decades older, I tested DC volts only and it was spot on to my (employer supplied) Fluke meter.





This reads in 50 RPM increments and I'll give it a try when I've got a bike together. They're still available online if you check around.

I used that one for my CJ7 for years, works great.
I uz

[Kelly E]

I use a Digi Sync manometer. It has a built in tach that calculates RPM using the vacuum pulses and is easy to read and very accurate.

[DaveBarbier]

No one here would happen to know how this gets hooked up, would they?

The green and black on the left gets me to measure voltage from the battery. Black negative, green positive. There is no manual on the internet for this.

Connections from back of pack found on net.

Works like a charm, thanks again!

[Deltarider]

Just curious what kV you will see with a spark plug adapter fitted. Your tester is the first one I see that has this.

[DaveBarbier]

Just curious what kV you will see with a spark plug adapter fitted. Your tester is the first one I see that has this.

I don’t even know what the picture is showing there. What’s a spark plug adapter? I imagine just something I can clip the lead to while the bike is running. Wonder if I can strip some spark plug wire and make a little pigtail.

[Deltarider]

Just curious what kV you will see with a spark plug adapter fitted. Your tester is the first one I see that has this.

I don’t even know what the picture is showing there. What’s a spark plug adapter? I imagine just something I can clip the lead to while the bike is running. Wonder if I can strip some spark plug wire and make a little pigtail.

Yeah, I think that's the idea. Your analyzer looks like a nice one. Usually the accuracy of the ammeter is a joke, especially with a shunt applied. I wouldn't use that function and avoid the risk of melted wires once you have forgotten to switch the selector back and are measuring Volts.

[Rookster]

The spark plug adapter is a spring that connects between the plug wire and the plug.  It allows you to clip your lead directly to the spring.  Here's a picture of the one from my Actron timing light.  I fitted a plug connector for the coil wire to clip too.



Scott