Tri-Spark EI and coil testing

marshg246 said:
I wonder how many other EIs have failed after 10 years (Note post #1 here). So far, I've never replaced a Tri-Spark single/twin, but have replaced five failed EIs from others. The only two Tri-Spark Tri-0005B returned to me are running in bikes today. I've never had a Tri-0005A or Tri-0006 returned. I've sold/used 168 of the single/twin and many Tri-0002 for triples.
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Likewise, most that I know that have failed are incorrect installation - you will be surprised how many 'I have been working on British bikes all my life' experts out there don't know if the bike is positive or negative earth and don't even know how to tell the difference. The last one that was 'faulty' the customer found the loom was in such bad condition it was only providing voltage now and again. Loom repaired problem solved.
 
Also, there is another issue that we see often and that is the rotor sleeve being loose in the rotor. Usually found when strobing, stop bike and find the static timing is out.
 
jamesp said:
Ashman’s Joe Hunt magneto is starting to come into sharper focus, although it doesn’t have an advance curve.
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I find that Ashman's Joe Hunt magneto looks much better when its out of focus, it may work well, but I can't forgive the way it looks
 
jamesp said:
Problem solved! Evidently, the Tri-Spark failed. A big thank you to Matt Rambow who sent me a Tri-Spark EI unit off of one of his running bikes. After installing his known to work unit, I fired my Norton up and listened to that sweet sound, with no spitting or back firing! Also, thank you to Stephen Kelly for offering to test my old unit and sell me a new one at a discount. Thank you to Greg Marsh for giving me lots of suggestions.
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Not surprising it was the TriSpark ignition module given your description of the symptoms. They can fail on a bike properly wired. Bad luck of the draw. I've been there.

Matt is a mature top tier resource for Norton owners. He does not blame the customers publicly.
 
DennisMo said:
I see it differently (and installed a Trispark earlier this year and note it has performed well and very much improved engine idle)

I am grateful that we can get parts for our bikes and keep them running for decades more. Yes, once in a while, I run across parts that do not measure up due to deficient design or quality problems. But when this happens, I think that I cannot expect perfection and as long as the vendor works hard to remedy the problem, I am happy.

Dennis
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30 miles?
300?
3000?

With all due respect, the calendar is a rather useless data point.

Cheers
 

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