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Author Topic: New Spark Plugs Make My Bike Run More Smoothly  (Read 4094 times)
rule62
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« on: February 24, 2009, 09:06:14 AM »

The title says is all.  After almost 14,000 miles, I thought it might be time to replace the stock "champion" plugs.  I went with NGK iridiums DPR8EIX-9.  They've got the threaded tip to accept my plug wires, rather than the little nodule at the top.  They also take a slightly larger socket (18mm, 3/4") than what the stock tool kit provides.  The "-9" at the end means that they're gapped at .9mm from the factory.  Our very own "Mad Scientist" let me know that there are a lot of duc enthusiasts that agree that .9 is the way to go.  I just popped them in and away I rode.  Low speed stuff is smoother.  The transition from idle to throttle on, is night and day.  It was getting kinda choppy before I changed the plugs.  Got 'em on fleaBay for less than $7.00 a piece.
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Dietrich
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« Reply #1 on: February 24, 2009, 10:07:16 AM »

Toldja.

 Grin
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Monster Dave
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« Reply #2 on: February 24, 2009, 02:10:17 PM »

I've got 22k on my monster now...and I'm not sure if as plug has been changed on any previous services or not....

My Bike's still running great though; aside from needing the idle adjusted a little so that when its cold it revs smoothly.

...I'm probably due for a tune-up.
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Monster Dave
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« Reply #3 on: March 05, 2009, 07:40:04 AM »

Hey Ryan,

How hard was it to do a spark plug change on your Monster?
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NAKID
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« Reply #4 on: March 05, 2009, 11:48:54 AM »

Serious? Dude, they're in a fairly easy are to get to...
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Monster Dave
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« Reply #5 on: March 05, 2009, 12:08:21 PM »

Serious? Dude, they're in a fairly easy are to get to...

It's just something that I've never done before (in general). So gapping a plug and all that goes into it would be a new expierence.
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DG
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« Reply #6 on: March 05, 2009, 02:32:57 PM »

Plugs in & out is really straight forward. Just don't install too tight. It doesn't take much. Gapping is easy but you need a feeler gage or a wire gage. The most improtant thing is making sure the new plugs have the same "reach". That's the length it protrudes into the cyclinder. Too long and the piston will hit it. Not good!
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Monster Dave
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« Reply #7 on: March 05, 2009, 02:49:18 PM »

Thanks for the tip!  waytogo
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NAKID
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« Reply #8 on: March 05, 2009, 05:48:39 PM »

Get some iridium plugs. Awesome performance and pre-gapped. Take the old ones out, put the new ones in. Done...
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Monster Dave
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« Reply #9 on: March 06, 2009, 07:47:54 AM »

Get some iridium plugs. Awesome performance and pre-gapped. Take the old ones out, put the new ones in. Done...

Chris, is there a mfg name for those or a model number for the ones for the Monster?
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Dietrich
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« Reply #10 on: March 06, 2009, 08:16:44 AM »

Dave, see the post that started this thread....Rule spells it out for all, same bike as you even....
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rule62
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« Reply #11 on: March 06, 2009, 06:18:16 PM »

Here's where I got 'em.  You'll need 2.

http://cgi.ebay.com/ebaymotors/1-NGK-IRIDIUM-IX-SPARK-PLUG-DPR8EIX-9-Honda-Yamaha-more_W0QQcmdZViewItemQQ_trksidZp1713Q2em153Q2el1262QQcategoryZ35595QQihZ019QQitemZ290275113658QQtcZphoto

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Electron
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« Reply #12 on: March 14, 2009, 08:51:33 PM »

Sometimes all you need are some good plugs.   chug
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Monster Dave
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« Reply #13 on: March 16, 2009, 05:53:48 PM »


Thanks for posting this up Ryan!
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NAKID
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« Reply #14 on: March 16, 2009, 06:16:45 PM »

Thanks for posting this up Ryan!

The link he posted will save you about $.50 over buying them at the store...
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2005 S2R800
2006 S2R1000
2015 Monster 821
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