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Old 07-03-2005   #1 (permalink)
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Has anyone tried them ?

Are they worth the expense !
What difference did they make. cheers
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Old 07-03-2005   #2 (permalink)
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I tried them. No noticable difference in my bike.
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Old 07-03-2005   #3 (permalink)
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I have over 8000 miles on a set in my Thruxton - but could not really tell any significant difference over a regular set. Milage and performance seem about the same. JCW
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Old 07-04-2005   #4 (permalink)
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Modern engines run lean fuel mixtures which are harder to ignite, therefore they use more powerful ignition systems.

You won't get any gain from those plugs, the technology is all in the coils. They will however last very well.
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Old 07-04-2005   #5 (permalink)
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I used them in my 79 Bonneville(sold). Instant improvement. Started 1 kick always, idled smoother and at a lower rpm. Throttle response was "crisp". These were bonafide definate absolute improvements without a doubt, and the bike ran fine prior when using NGK platinums. Seat of the pants acceleration seemed somewhat better, but I will admit that as with a loud exhaust, you can make yourself believe there is improvement. It felt improved to me.
I used them on my 95 Speed Triple(sold) Instant improvement. Idled smoother, and had much better throttle response and definately accelerated better/stronger. The front wheel came up easier than prior when running standard NGKs. Both bikes were in tip-top tune, and using these plugs allows the engine to perform to the best of it's design. Read carefully again, not saying you will Magically make more horsepower, only that your ignition will perform to it's best. What it's truely capable of....with what it can only do. There's more to Iridium's than just longevity. Read about the theory and differences in the large diameter vs small diameter electrodes and you'll see how there will be improvement.

Yes, more modern ignitions may see very lttle improvement, but you will at least see longer life, and better idle and perhaps a slight improvement in throttle response in most cases....albeit so slight that many may not notice. Again, read about resistance at the plug and it's effects in the ignition system......... what would you rather use.

:-D

[ This message was edited by: texspeed on 2005-07-04 07:24 ]
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Old 07-05-2005   #6 (permalink)
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A good test would be to measure the voltage with an oscilloscope and compare the waveforms.
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Old 07-06-2005   #7 (permalink)
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Quote:
On 2005-07-05 05:30, cafestyle wrote:
A good test would be to measure the voltage with an oscilloscope and compare the waveforms.

Okay, yeah... I'll do that right now. :razz:
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Old 07-07-2005   #8 (permalink)
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Kstr don't forget to check the voltage peak on the back EMF - should be about 80V, then as the waveform indicates plug fire look for a concave (not convex) curve to indicate mixture at stoichiometric correct 14.7:1.
Of course don't forget to note the saturation period in milliseconds either.

But you probably knew all that..........
:lollol:
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