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Old 03-15-2013, 09:57 PM   #1
Williamldarby OP
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Yamaha Rt 3 dual spark plug

Ok so I got to thinking. I have two spark plugs in my motorcycle and I only use one at a time. Is there anyway to run both st the same time for better fuel burn. Just wondering if anyone has ever tryed.
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Old 03-16-2013, 03:58 PM   #2
concours
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It was all tried 40 years ago. No (perceivable) advantage
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Old 03-17-2013, 04:53 AM   #3
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A decompressor was available aftermarket for those struggling with the big RT, it fit in that second hole.
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Old 03-17-2013, 08:26 AM   #4
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With two plugs you can retard the timing and still get a complete burn. Two advantages,one is easier starting on a big bore smoker and two,if you can only find shit gas it'll burn it w/o detonation.
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Old 03-20-2013, 09:28 PM   #5
cam14
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Quote:
Originally Posted by pickle boat View Post
... current production Chrysler ‘Hemi’ uses two plugs per cylinder. Of course, it’s not really a hemi … maybe kind of a hemi – but that sells cars.
off topic, the second plug in the modern hemi is a "waste" spark for emisions.
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Old 03-21-2013, 05:16 PM   #6
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I would live to run more plugs for Easyier starting and more complete burn how would I go about setting that up
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Old 03-21-2013, 05:38 PM   #7
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Originally Posted by Williamldarby View Post
I would live to run more plugs for Easyier starting and more complete burn how would I go about setting that up
What bike?
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Old 03-21-2013, 06:46 PM   #8
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Rt 3 yamaha already has two plugs
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Old 03-22-2013, 05:15 AM   #9
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Beyond two there's no real improvement. Give the bike a good tune up and get the jetting spot on and she'll start and run well. Took quite a while to sort out my YZ465 but it's a 3 kick bike from cold and one kicker hot. And it only has one plug.

After some thought your bike currently runs two plug but only one is hot? You'll need another coil and high tension lead.
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