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07 1098s? can i use DENSO iridium IU27 spark plug? # 5363


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#1 Brian777

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Posted 13 May 2009 - 11:36 AM

The dealer stocks NGK MAR10A-J as a replacement plug.

Denso NOR NGK do not have any iridium plugs spec'd for 1098.

999 and 999R use champion plugs, each different model numbers.

I would like to use Iridium. Are 999, 999r and 1098 plugs swappable, or different?

Thanks!
Brian

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#2 Brian777

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Posted 14 May 2009 - 09:19 PM

anyone know?

#3 Hawkeye

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Posted 26 July 2009 - 10:08 PM

The IU 27 is AFAIK the correct spec Denso iridium replacement for the 1098.

Now, if only I could get the lower cylinder plug out with the supplied plug removal tool that came with the bike's meagre tool kit. Arrrgh!

#4 Roadrunner

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Posted 26 July 2009 - 11:28 PM

Hawkeye said:

The IU 27 is AFAIK the correct spec Denso iridium replacement for the 1098.

Now, if only I could get the lower cylinder plug out with the supplied plug removal tool that came with the bike's meagre tool kit. Arrrgh!

I know what you mean. I had to use an old sparkplug socket I had in my tool box...

#5 easty

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Posted 27 July 2009 - 07:47 PM

I got some of these on the Bay A few left with this chap. $41 including delivery 4 4

#6 Hawkeye

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Posted 29 July 2009 - 05:29 PM

There wasn't anything wrong with my spark plugs, but seeing how I have always felt the benefits from iridium plugs in my other vehicles, I went ahead and removed the stock NGK MAR10AJ plugs yesterday from my 7,500 km 1098 and replaced them with Denso Iridium IU27 plugs. I'm here to report that the bike performs MUCH better at idle and pick up, and want to recommend this change to everyone reading this. It is THAT much better, a difference in performance you can feel. And cheaper too, than the run-of-the-mill NGK plug that Ducati dealers sell.

You have to use the 14mm end of the Ducati spark plug tool that came with the standard toolkit to remove the NGK plugs, and then flip the tool around to use the 16mm end to fit the Denso's.

There was an initial fear that the 16mm end of the plug tool would not fit into the tapered plug access hole, but thankfully I've found that is not the case.

IU27 dimensions are 10mm thread diameter, 19mm thread length, 16mm Hex.

MAR10AJ dimensions are 10mm thread diameter, 19mm thread length, 14mm Hex.

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#7 AKKutz

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Posted 30 July 2009 - 10:00 AM

I just saw the IU27s are available from Parts Unlimited (which means most dealers can get) for a retail of about 10.45 ea. Now, is Hawkeye right and are these the right heat range for the 1098?

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#8 Hawkeye

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Posted 30 July 2009 - 05:19 PM

AKKutz said:

I just saw the IU27s are available from Parts Unlimited (which means most dealers can get) for a retail of about 10.45 ea. Now, is Hawkeye right and are these the right heat range for the 1098?

I have not removed the plug for a read. I will do that this weekend after I've used them a couple more days. So far the bike starts up just fine and fuelling has been exemplary - crisper than before, with revs climbing with much more immediacy.

Here's another take on the issue of correct plug type:

http://www.ducati-su...risk#post179243

#9 AKKutz

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Posted 31 July 2009 - 04:05 AM

Hawkeye said:

I have not removed the plug for a read. I will do that this weekend after I've used them a couple more days. So far the bike starts up just fine and fuelling has been exemplary - crisper than before, with revs climbing with much more immediacy.

Here's another take on the issue of correct plug type:

http://www.ducati-su...risk#post179243

He is the master... I the doubter. I found nothing to match these plugs to anything beyond the 999 series. I imagine it is another Ducati conspiracy to buy plugs from them only. I ordered up some, just the same, so we will see.

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#10 Roadrunner

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Posted 08 August 2009 - 08:39 PM

Hawkeye said:

I have not removed the plug for a read. I will do that this weekend after I've used them a couple more days. So far the bike starts up just fine and fuelling has been exemplary - crisper than before, with revs climbing with much more immediacy.

Here's another take on the issue of correct plug type:

http://www.ducati-su...risk#post179243

Thanks for the info man. I just ordered a new set of belts and the Denso Iridium IU27's. Have to do my 15,000 mile service next week. Wooohoo :)

#11 Hawkeye

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Posted 10 August 2009 - 07:30 PM

Read any good sparkplugs lately? :)

I've gone 200kms since the install, so over the weekend, I removed the IU27 plugs to have a look and they both sported a slightly dark tan colouring on the centre electrodes. The plug from the front cylinder was slightly lighter in colour. They were about the same colour as the MAR10AJ's that I removed earlier, and I'd regard this as normal. The bike has been run on Shell 98 RON fuel exclusively.

It'll be Iridium plugs only from now on for this 1098 rider. :)

#12 lucky phil

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Posted 11 August 2009 - 11:19 PM

Hawkeye said:

I have not removed the plug for a read. I will do that this weekend after I've used them a couple more days. So far the bike starts up just fine and fuelling has been exemplary - crisper than before, with revs climbing with much more immediacy.

Here's another take on the issue of correct plug type:

http://www.ducati-su...risk#post179243
A plug chop on a 1098.......beautiful.
BTW thanks for the plug info.
Ciao
If you're not living on the edge,you're takin up to much room.

#13 railed

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Posted 21 August 2009 - 12:58 AM

Sounds like the Denso are working good.

Even though NGK doesnt consider it a replacement plug the CR10EIX has all the same specs

CR10EIX

Thread Size: 10mm
Seat: Gasket
Reach: 19mm (3/4")
Hex: 5/8" (16mm)
Terminal Type: Stud
Resistor: yes
Gap: .032" (0.8mm)
Heat Range: 10

MAR10A-J

Thread Size: 10mm
Seat: Gasket
Reach: 19mm (3/4")
Hex: 9/16" (14.3mm)
Terminal Type: Solid
Resistor: yes
Gap: .032" (0.8mm)
Heat Range: 10

you can compare them here
http://www.ngk.com/s...=45&action.y=12

Only reason i say anything is i rather like NGK compared to Denso, seen alot more faulty denso plugs that NGK, but thats just me...


also
you will have to order the terminal nuts if you dont have any. i dont think the ones on the stock plug thread off

Edited by railed, 21 August 2009 - 01:01 AM.


#14 XXTi

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Posted 21 August 2009 - 07:10 AM

This is an interesting thread. I'm glad there are a few options for the 1098.

I just had a 7500 mile service done at my dealer and they replaced the plugs. I was charged $55.89 EACH for the replacement OEM plugs!!!

I checked out the NGK web site and the recommended MAR10A-J plugs were listed at less than $13 each. I'd recommend buying a set somewhere other than a dealer before taking your bike in for service. I expect to pay a stiff mark up for parts at a dealer, but I think this kind of charge is unreasonable. I feel like I've been ripped off.
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#15 railed

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Posted 21 August 2009 - 08:14 AM

you are, the dealership should be smart enough to order then from Parts Unlimited instead of from ducati....

#16 JDS1098S

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Posted 21 August 2009 - 10:05 AM

Thanx for starting this post Brian. Thanx for the info Hawkeye. $38 for the NGK MAR10AJ is the highest I have ever paid for a spark plug. I will be looking into Denso Iridium IU27
Anybody know who would sell them in Canada?
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#17 Roadrunner

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Posted 21 August 2009 - 07:46 PM

XXTi said:

This is an interesting thread. I'm glad there are a few options for the 1098.

I just had a 7500 mile service done at my dealer and they replaced the plugs. I was charged $55.89 EACH for the replacement OEM plugs!!!

I checked out the NGK web site and the recommended MAR10A-J plugs were listed at less than $13 each. I'd recommend buying a set somewhere other than a dealer before taking your bike in for service. I expect to pay a stiff mark up for parts at a dealer, but I think this kind of charge is unreasonable. I feel like I've been ripped off.

Yeah, the dealer is good for that shit. I just can't bring myself to take my bike to the dealer for anything but recalls.

I just got done doing my 15,000 mile service yesterday. $135 for new belts, $20 for new Iridium spark plugs, and about a day of foolin' around in the garage. The coolest thing is that all of my valves are still well within spec and haven't required any adjustment yet.

Posted Image

Posted Image

Edited by Roadrunner, 21 August 2009 - 07:48 PM.


#18 railed

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Posted 21 August 2009 - 08:49 PM

That's actually very common for the 1098's. I finished my 15k 2 weeks ago and haven't had to adjust a valve yet. Now if only they can fix the valve guides. And my f*cking cam's hardcoating is flaking....

You didn't mention fuel filter... I tell everyone to do them every other service.

#19 lucky phil

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Posted 22 August 2009 - 12:30 PM

railed said:

That's actually very common for the 1098's. I finished my 15k 2 weeks ago and haven't had to adjust a valve yet. Now if only they can fix the valve guides. And my f*cking cam's hardcoating is flaking....

You didn't mention fuel filter... I tell everyone to do them every other service.
Whats wrong with the valve guides? pictures of the cam hardcoating?
Ciao
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#20 Roadrunner

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Posted 22 August 2009 - 04:00 PM

railed said:

That's actually very common for the 1098's. I finished my 15k 2 weeks ago and haven't had to adjust a valve yet. Now if only they can fix the valve guides. And my f*cking cam's hardcoating is flaking....

You didn't mention fuel filter... I tell everyone to do them every other service.

Didn't notice any issues with the hardcoating on the cams. I did the fuel filter last time around so I didn't bother with it this time.

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