Half power

Kthomas said:

Thanks
Maybe I’ll try and take mine apart , clean it and sort it out.

Click to expand...

There is a great writeup here..

Thanks
I’ve got steady power now and my tri spark isn’t working. I’ve got no resistance between the positive side of the coil and tri spark unit so the grounds are good and the hot ( black and white ) wire attached to the right side negative has continuity. I had it wired up to the connections as shown in wiring diagram . Grant Tiller with tri spark shows a jumper between neg and positive in the middle ( one coil to the other ) . Bills Norton diagram shows positive to positive and negative to negative on the coils. When I run the test function with the jumper running from neg to pos between coils the light on unit seems to pulsate slightly but no spark. This is driving me crazy.
I realize now I should have just wired it from scratch without the stock harness

Kthomas said:

Grant Tiller with tri spark shows a jumper between neg and positive in the middle ( one coil to the other ).

Click to expand...

That is correct for a wasted spark system such as the Tri-spark Classic Twin where the coils must be connected in series.

Kthomas said:

Bills Norton diagram shows positive to positive and negative to negative on the coils.

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That's for original contact breaker (points) ignition where the coils are connected in parallel:

Could I have damaged the unit by having them the other way as I have no spark

Kthomas said:

Could I have damaged the unit by having them the other way as I have no spark

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I couldn't say for sure.

Have you gone through the Tri-Spark test procedure from page 11 of the instructions?
Are you grounding the plugs (on the cylinder head?) and does the engine have a ground (wire) connection to harness positive (red) for the Tri-Spark module?

L.A.B. said:

I couldn't say for sure.

Have you gone through the Tri-Spark test procedure from page 11 of the instructions?

https://www.trispark.com.au/assets/files/Classic%20Twin%20V3%20Manual%20V3.pdf

Are you grounding the plugs (on the cylinder head?) and does the engine have a ground (wire) connection to harness positive (red) for the Tri-Spark module?

Click to expand...

I did run the test. Power to unit but no sparks. Plugs grounded to head. No dedicated wire straight from unit to positive side of coil but there is no resistance. In other words great ground.

Page 2 of the instructions seem to have the only warning relating to incorrect polarity connections.
If reversed it says there would be ignition damage. (if that is the case here)

I don’t think wiring the Coils like you would have it for points ( which is the way I mistakenly had them )would hurt the unit because it was basically still positive ground . I would think it would just be going through the one coil.
I may be wrong though

I got it all sorted.
Thanks everyone