Rev Counter Wiring

[Bilko]

Could someone please explain to me how to wire my rev counter?

I have red, black & green.

The manual says red to ignition switch, black to battery, (-) & green to coil (negative).

Not sure where on the ignition switch the red would go and where the green goes on the coil?

Does anyone understand how it works?

I was led to believe one wire went round the HT lead. I assume I'm wrong?

For a varitronic ignition

[byron]

what sort of rev counter ?
what sort of [electrical] power have you got ?
my Honda NSR tacho is wired to a +ve DC supply, earth and the green on the CDI.

[wezly]

what make is it? i should think reds the feed and green wraps around the ht lead and black to frame

[byron]

and do varitronics spark twice per rev ?
that could confuse it if it thinks it's on a single cylinder two stroke

[Bilko]

This is it here

As it's a Varitronic I've got it set for a twin cylinder.

I was going to get a 9V battery from Broady. Failing that I can use a normal 12V battery if it's needed.

[byron]

it will like a decent DC supply to work properly
the red will go to that
the black to earth
and the green to the green on the CDI, which is the nearest to being fitted on the -ve side of an HT coil fitted to a car.
be interesting to see what it reads, a four cylinder four stroke will spark twice per revolution iirc. that might be wrong I haven't done anything like that on a four stroke for ages.

[Bilko]

Sorry for being thick, but red goes...?

Thank you.

[J1MS]

Dont really know this rev counter... but usually an electronic rev counter has a pickup wire, a dc+ feed and an earth.... some have a seperate wire for back lighting (with on some an aditional earth)..... The red wire on my daytona rev counter is the dc live feed, which I have switched at the ignition key switch.... Hope this info is of some use.. sorry I cant be more informative...

[Bilko]

Thank you.

electrics are most definately not my thing and I can't get the hang of them.

[byron]

... red goes...?

so as J1MS said to a [ideally switched] live DC.
depends upon how the bike is wired up... where the wires from the battery go, what ignition switch you're using.
if you haven't got the wiring in place already just connect an external DC source [like a 9v PP battery or battery charger], the green to the CDI and earth the unit and see what readings you get... you don't want to spend time & effort cabling up for something that's not going to be useful...