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Experienced spark plug readers please see pics

Just took these out of my 2000 R1100S. The previous owner must have installed them. What's the original factory part?
I know the shape and color are supposed to mean something. What do these tell you?


Old 07-06-2007, 06:22 PM
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They look like Bosch Platinum +4 No# 4417.

What's wrong with them? $5.50 or so each.




NGK BKR7EKC
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Old 07-06-2007, 06:29 PM
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I know what they are and I have already replaced them.

What's the original factory part?

I know the shape and color are supposed to mean something.
What do these tell you?
Old 07-06-2007, 06:36 PM
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...they look fine.... if aanything, the bike runs a little on the lean side of things
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Old 07-06-2007, 06:39 PM
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Thanks signit. Is there a way to enrich the mixture without a chip? I guess that would explain why it "pops" sometimes on deceleration.
Old 07-06-2007, 06:40 PM
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...power commander or, something alike... no cheap solution, really.

Does your bike have mods on the intake side (free flow filter) or on the exhaust side (cat eliminator, race exhaust)? These things make it necessary to adjust the mixture...


How many miles on the bike? Take out the O2 sensor and see what that looks like... that's another good indicator.
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Old 07-06-2007, 06:49 PM
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I think they look fine. Be ye glad.
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Old 07-06-2007, 07:06 PM
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The Two Brothers cat eliminator is installed. Other than that I believe it is totally stock. I think I'll leave it alone.

Thanks guys!
Old 07-06-2007, 07:12 PM
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Wow that is weird. I just pulled my plugs yesterday to check on them and they look virtually identical. Why does the right cylinder leave the plug a bit black while the left one doesn't... that's what I want to know.


And you know, I like these Bosch plugs more than the NGKs.
Old 07-06-2007, 07:38 PM
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I think it's a political thing Sergio. I'd take 'em back.
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Old 07-06-2007, 07:42 PM
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Re: Experienced spark plug readers please see pics

Quote:
Originally posted by BSnyder
[B]
I know the shape and color are supposed to mean something. What do these tell you?

I see a tall brunette in your future.... And a large sum of money staying in your pocket... Now is the time to invest.






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Old 07-06-2007, 07:52 PM
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Re: Re: Experienced spark plug readers please see pics

Quote:
Originally posted by wswartzwel
I see a tall brunette in your future.... And a large sum of money staying in your pocket... Now is the time to invest.
Now THAT was funny.
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Old 07-06-2007, 07:56 PM
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Sergio- I dont know what side each of my plugs came from. I didn't pay much attention to them when I removed them and didn't notice the difference until I brought them in the house.
Old 07-06-2007, 08:04 PM
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Quote:
Originally posted by SergioK
Why does the right cylinder leave the plug a bit black while the left one doesn't... that's what I want to know.


It is caused by vortex swirl effect in the northern hemisphere....if you were in Australia then the left one would be darker than the right.....

Brock
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Old 07-06-2007, 08:16 PM
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Bsnyder... the answers in this thread should tell you ANYTHING and EVERYTHING you'll ever need to know about this board...
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Old 07-06-2007, 08:30 PM
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Yes What is the Issue>?

If it starts with a spark and we want hp from it; what do these plugs say to this audience?

BTW, this is rich:
http://www.liveearth.org/broadcast.php#searchdevice
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Old 07-06-2007, 08:52 PM
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Old 07-06-2007, 08:54 PM
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Quote:
Originally posted by Tirebiter
It is caused by vortex swirl effect in the northern hemisphere....if you were in Australia then the left one would be darker than the right.....

Brock
The Coriolis effect? From the toilet to the S... nice. I heard that removing the canister reverses that?
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Old 07-07-2007, 02:04 PM
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Hi BSnyder,

some time ago I had the same doubt and I found useful the following link:

http://www.densoiridium.com/howtoreadusedplugs.php
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Old 07-08-2007, 08:11 AM
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Luca:

Very nice link!

Has anyone seen a comparison of plugs between pure gasoline (is there such a thing?) and gasohol? With E85 starting to show up (in the Midwest where they grow it) what does that do to plugs? Do we need to get some alcy burning funny-car engine types here?

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Old 07-08-2007, 08:37 AM
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