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 GRiSO 1100 - "Internal" Spark Plugs

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Oz1200Guzzi
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Matias
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PostSubject: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Fri Jul 29, 2022 1:42 am

Hi all,

My GRiSO 1100 has 42.000 km on the clock and I have never changed the so called "internal" spark plugs (or even checked if they were tight...).
How bad can this be? How hard is it to get to these things?

Thanks, Matias.
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Pete Roper
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Fri Jul 29, 2022 2:17 am

You need a thin walled socket to get them out as they are in very close proximity to the fins. Before attempting to remove them make sure you blow out the area around them vigorously with compressed air as all sorts of rubbish gets stuck around them, gravel, insect corpses etc. all of which will take the opportunity to drop down the plug hole into the cylinder if they aren't evicted before the plug is removed.

Having been left in for so long they are likely to be seized in pretty tight. When trying to remove them make sure you apply as little sideways force as possible try and keep the extension to the socket as close as coaxial to the plug. If the plug does snap chances are you'll need to take the head off to extract the threads from the head itself.
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Matias
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Fri Jul 29, 2022 3:37 am

Hi Pete,
Thanks again for tour support.
Matias
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eighteight
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Fri Jul 29, 2022 5:38 am

Apply "Kroil" or your favorite penetrating oil after blowing out the well
Let it sit before applying wrench JMO

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Matias
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Fri Jul 29, 2022 5:56 am

Thanks 88
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guzziownr
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Fri Jul 29, 2022 7:59 am

eighteight wrote:
Apply "Kroil" or your favorite penetrating oil after blowing out the well
Let it sit before applying wrench  JMO

I did this for a few days, riding in between to get the engine hot for more possible penetration. The exterior of the plugs was severely rusted.

I'm glad I didn't read Pete's warning about them snapping before I took them out. I have enough anxiety in my life!
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eighteight
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Fri Jul 29, 2022 11:54 am

On a somewhat related note, ordered NGK`s from Summit Racing back in April when I bought the bike
They arrived TODAY !

Very Happy

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CanBike
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Tue Aug 16, 2022 6:47 pm

I recently bought this tool from Amazon to do the inner plugs on my Sport 1200. Worked great.

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Oz1200Guzzi
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Wed Aug 17, 2022 12:15 am

Also beware they are VERY easy to cross thread when re-installing. Read Pete's warning on keeping it axially perfect. Don't forget a smear of neverseez, copper-kote or similar before reassembly. If they get cross threaded, it is the same result as a snapped off plug - the head will need to come off. Good thing is it's a standard 10 mm thread (medium I think) and should be in any metric tap and die kit.

Don't ask how I know - well since you ask, on the Sport you need a 3/8" drive and not a 1/2" drive - the 1/2"drive hits the top frame rail on the Sport and the plug is not then axial to the hole. Perhaps a piece of plastic hose, fitted over the porcelain to get them started, before using the socket et al.

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eighteight
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Thu Aug 18, 2022 3:46 am

CanBike wrote:
I recently bought this tool from Amazon to do the inner plugs on my Sport 1200. Worked great.

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With or w/o the extension ?

Thank you
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Pete Roper
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Thu Aug 18, 2022 4:05 am

It says 12" total length so one assumes the extension is part of the tool. Yes?
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eighteight
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Thu Aug 18, 2022 4:10 am

Yes, it`s part of the tool IF you order it that way
Appears you can also order just the socket
Wondering which one CanBike used
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Thu Aug 18, 2022 4:23 am

I bought it with the extension. It's pressed into the socket and swivels off angle. On the Sport, I was able to get it angled just past the frame rail. Worked very well. Then I used the old tubing trick to get the new plug started in straight.

Btw - The inner plugs cost me $40 bucks (CAN) a piece at a local auto parts shop. That stung.

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eighteight
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Thu Aug 18, 2022 4:41 am

Thanks for the clarification Very Happy

$12 USD from Summit but the wait was long
Knew that going in as they stated "Back ordered"
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Pete Roper
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Thu Aug 18, 2022 4:41 am

Don't bother with the silly plugs, just use ordinary ones and change 'em a bit more often. Less chance of them seizing in as well. What are they? CR8EK-B's I think from memory.....
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CanBike
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Thu Aug 18, 2022 6:46 am

My 2v Sport called for NGK PMR8B. I would have opted for cheaper plugs and changing them more often had I known it was a fairly easy job.

Replacing the oil pressure sensor was a different story...

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eighteight
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Thu Sep 01, 2022 11:50 am

CanBike wrote:
I recently bought this tool from Amazon to do the inner plugs on my Sport 1200. Worked great.

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Tried to order
"Amazon can not ship this item to your location"

??
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Stoked On Spokes
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Thu Sep 01, 2022 1:07 pm

I took my deepwell socket and threw it on a drill. Took it to my grinder wheel and spun it up with drill rotating. Was able to make the a thin wall socket in minutes. [You must be registered and logged in to see this image.]

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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Fri Sep 02, 2022 5:07 pm

In Canada NGK has a site with great prices, not sure about other countries. Cheers
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Pete Roper
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Fri Sep 02, 2022 5:27 pm

Just use CR8EKB's and throw them away a bit more often. Leaving them in too long just increases the risk of them seizing and causing more damage when you try to get them out.
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Oz1200Guzzi
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Fri Sep 02, 2022 6:17 pm

I take mine out every 20,000 km, just on principal. And I replace them, regardless. Still they can rust up in there
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Motoguzzimackers
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Sat Sep 03, 2022 2:50 pm

Try a dirt bike shop - Motion Pro make a Stepped Swivel Socket Extension.

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bioman
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Sun Sep 04, 2022 8:38 pm

Just a request for clarification, because I am a little confused now:


On a GRiSO 1100, the thread size of the 2 inner plugs is 10mm, while the thread size of the 2 outer plugs is 14mm.  Is that correct?

Checking because in an other Ghetto discussion the NGK CR8EIX Iridium was suggested as a superior outer plug, but that plug comes in 10mm so is not suitable for the GRiSO 1100.
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Pete Roper
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Sun Sep 04, 2022 9:51 pm

bioman wrote:
Just a request for clarification, because I am a little confused now:


On a GRiSO 1100, the thread size of the 2 inner plugs is 10mm, while the thread size of the 2 outer plugs is 14mm.  Is that correct?

Checking because in an other Ghetto discussion the NGK CR8EIX Iridium was suggested as a superior outer plug, but that plug comes in 10mm so is not suitable for the GRiSO 1100.

Yeah, you can use them for the inners, not the outers.

As I've said though you can't really go wrong with CR8EKB's. They're a twin electrode plug so they'll last near as dammit twice as long as a single electrode plug if you wish to push the boundaries a bit but really, being so cheap, you can just fling 'em more often.
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PostSubject: Re: GRiSO 1100 - "Internal" Spark Plugs   GRiSO 1100 - "Internal" Spark Plugs Icon_minitime1Mon Sep 05, 2022 12:29 pm

Thanks Pete. That is clear then.







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