| Author | Message | ||
     Speedfreaks101 |
http://www.ngksparkplugs.com/apps/motorcycles/ If you select a Lightning you get a different plug from the firebolt. Now for the next part. I have read that DCPR9EIX NGK is a direct replacement but one heat range cooler than stock , but which one is correct for the stock replacement? Seems like their system needs a little work. The standard replacement plug from Denso plug is IXU24 and the colder version of the same plug is IXU27. If you read Xbolt12 and Al_lighton's posts in the following thread then you see that NGK may be further off than their website even than I previously thought. http://www.badweatherbikers.com/buell/messages/32777/85656.html So it appears that the NGK is off but if tou read Dcmortalcoil's post then you can come to the conclusion that the IXU24 (which is the common XB Plug) is actually one step too hot also. Any thoughts? Bart (Message edited by Speedfreaks101 on February 19, 2006) | ||
| Dmextreme |
yeah I just bought the NGK Iridiums DCPR7EIX Which I asked them specifically which plug went with my model CityX. He responded with that part number. I hope it works. If it doesn't I will be pissed, it was 23 bucks for 2 damn plugs, including shipping.. | ||
| Percyco |
The NGK website calls for a DCPR8E sparkplug for a XB9.......so is that a correct plug for a XB9S ? | ||
| Speedfreaks101 |
Dmextreme If all the info that I have seen is correct then your plugs are two heat ranges too hot. This could possibly lead to pre-ignition and detonation. Detonation can destroy an enigne and pre-igntion is not exactly an engines friend. Percyco If you read the post by Xbolt12 and Al_lighton that I referenced then you will see that the DCPR8E plug appears to be one heat range too hot. | ||
| Buellin_ri |
Thats why I just went with the Factory Race plugs (split fires). If Buell says it ok, must be ok. Though I've never been a fan of the split fires, they seem to work just fine, never fouled em yet. | ||
| Dmextreme |
Well I emailed NGK, they sent me the response back specifying the Part number. Should I reconsider? I mean you research and ask a respected Spark plug company, you'd think it be the right answer. Any ideas? | ||
| Speedfreaks101 |
My worry is that they have not corrected their system. We know that they give two differnet part #'s listed on their site for the XB Lightning and Firebolt. Also the year models are not right. Knowing this I do have to wonder are they using the same system to reccomend parts to us and how many mistakes are there? I just noticed a few things about the posts I quoted: When Al spoke about the plugs he was talking about the standard plug and not the Iridium. I also noticed that that Xbolt12 quotes the old part # so maybe when NGK started using the new numbers they correct the issue with the head range but that still does not explain the difference between the recommnedation for the XB models. Maybe AL will chime in. (Message edited by Speedfreaks101 on February 19, 2006) (Message edited by Speedfreaks101 on February 19, 2006) | ||
| Whiskeytango |
I've been running NGK Iridium plugs #2316(DCPR9EIX)on my 04 XB12s for the past 4 months or so with great results. WT | ||
| Dmextreme |
I hope Al does Chime in here pretty soon. I'd like to know before I install them. | ||
| Ejiii |
I can tell you this. For the Honda S2000 automobile an NGK plug comes standard from the factory. The specified plug is clearly listed in the S2000 owners manual. If you call NGK for an S2000 plug they suggest a different number than the one they originally delivered to Honda. Who is right? Who is going to provide warranty assistance if there is a failure related to the incorrect plug? I would stick with the OEM suggestion and forget what NGK says. | ||
| Dmextreme |
yeah same here, I am hoping I don't have to return them. I would hate to put them in and then all the sudden detonation. Be a nice tank slapper and stuff.. But I thought there were a few other people on this forum that did get the Iridiums. I wonder.. DaveS.. speak up, what do you think? or anyone else for that matter. | ||
| Trojan |
NGK have it all wrong on their web site, and haven't updated the plug fitting since Buell changed from the 6R12 to the 10R12 plugs some years ago. The correct iridium plug for ALL XB motors is the NGKDPR9EIX-9 This is what we have used for the past 4 years on the street and the track with excellent results. They will not foul, period  | ||
| Dmextreme |
Sigh.. I hate waiting.. now I have to contact NGK and get an exchange for the correct plug. Thanks Trojan! | ||
| Dmextreme |
Good news. Emailed NGK. She advised that indeed they were incorrect. They shipped the new plugs out today and when I get the ones I ordered, to just ship them back at their cost. I was impressed, excellent service. Thanks again Trojan. Preciate it. | ||
| Speedfreaks101 |
Thank you Trojan. I do appreciate it. | ||
| Al_lighton |
Matt pretty much covered it. I've been out of town at the Indy Dealer show, didn't bring a laptop (mistake). Any Buells past the S2 want the heat range 9, not 8. I'm not convinced about the benefits of the Iridium plugs on a stock Buell engine. I'm sure they work just fine, but I'm not so sure that they are worth spending more money on. Longevity isn't worth it to me, I'll have the plugs out as part of some other engine activity long before they are worn out, and would probably replace them for other reasons long before electrode wear becomes an issue. I'm not sure that one could measure any performance gain on a stock engine with them. Now, if the engine is breathed on, with raised compression and/or other mods, and ignition system changes, maybe then I'd spend more coin on the hi zoot plugs. I could be convinced otherwise with the right data, but I've never seen anything other than anecdotal stories of folks changing to them and liking them without any data to support the claim. I personally have NEVER fouled a plug on a Buell, and have not even been running platinum plugs. SO I guess its a case of not wanting to fix it if it isn't broken. Al | ||
| Chadhargis |
I've always heard the wives tale that the Iridium plug performance doesn't degrade over time like a standard plug will. Of course, I'm pretty dilligent about changing my plugs, so I've never see any performance decline. Now...in my truck or my wifes car, it might be an advantage because I tend to ignore things with 4-wheels. (Message edited by chadhargis on February 21, 2006) | ||
| Blake |
What Chad said. As I understand the issue, as the sharp edges wear and become radiused over time, the voltage required to jump the gap increases significantly. The sharp edges wear away much more quickly on conventional versus platinum versus iridium electrode plugs. I use the iridium plugs. They ain't that expensive. | ||
| Alexfiggy |
i ordered ngk from iron machine for my xb9 05 sx and they sent me this part kr8ai 5477 they seem to work fine | ||
| Firebolteric_ma |
The correct NGK IRIDIUM PLUG for XB motors is PART # NGKDPR9EIX-9 as trojan says. the NEW NGK part number for that plug is a # 5545 using there new part number book. hope it helps some..  | ||
| Speedfreaks101 |
DCPR9EIX vs DPR9EIX-9 Go to the bottom left and click on the link for "Manufacturer's Numbering System" then you can view the breakdown for the numbering system. http://www.ngk.com/sparkplug411.asp The DCPR9EIX main difference is that it is a resistor plug and that may assist those of us who use some type of audio or communication system. Other than that I can't see a difference. I do not know of any drawbacks to resistor type plugs so if I am missing something please let me know. Thanks, Bart |
