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Author Message   Xbolt12 Posted on Monday, December 27, 2004 - 01:55 am:        The 9 heat range works great guys. Not a hint of fouling either. DPR9EIX if memory serves, but see my older post to confirm the part number. This bike just keeps on getting better... xbolt12   Xbolt12 Posted on Tuesday, December 28, 2004 - 12:13 am:        DCPR9EIX is the proper plug (one heat range cooler than stock in NGK Iridium). My bad on the previous post. xbolt12   Firebolt1203 Posted on Tuesday, December 28, 2004 - 12:43 am:        Why are you running a colder plug? NGK calls for a DCPR8E and the iridium is KR8AI. I just the KR8AIs in my bike and it runs fine.   Glitch Posted on Tuesday, December 28, 2004 - 08:16 am:        The cooler plug has helped with pinging, for me any way.   Bigbuells Posted on Tuesday, December 28, 2004 - 01:39 pm:        I just had iridiums plugs ordere,Advance auto cross referenced stock and came back as part number dpr9eix-9.So I ordered them.Now I see DCPREIX9 is the correct plug.Im a little confused ,shouild I use the DPR9EIX-9 in the bike?Anyone else using this plug?   Fullpower Posted on Tuesday, December 28, 2004 - 04:06 pm:        so which one has a 5/8 hex?   Bigbuells Posted on Wednesday, December 29, 2004 - 05:01 pm:        Well Ipicked up DPREIX-9 plugs and they are 3/4 hex.I should order other ones also.I'm going to go ahead with install of these, cause that looks like the only difference between them and stock ones.   Fullpower Posted on Wednesday, December 29, 2004 - 06:49 pm:        3/4 hex? and you can fit a 3/4 wrench in their with the rear plug?   Spyder12s Posted on Wednesday, December 29, 2004 - 07:28 pm:        DPR9EIX-9 (5545) ....12mm, 3/4" reach, 18mm hex DCPR9EIX (2316)...12mm, 3/4" reach, 5/8" hex So that seems to be the only difference ...now If I could get these at work .. the rest of the specs... gasket seat, projected tip, resistor, fine wire (0.6mm) iridium center electrode, tapered cut ground electrode From NGK... "An unaltered engine will run within the optimum operating range straight from the manufacturer, but if you make modifications such as a turbo, supercharger, increase compression, timing changes, use of alternate racing fuels, or sustained use of nitrous oxide, these can alter the plug tip temperature and may necessitate a colder plug. A rule of thumb is, one heat range colder per modification or one heat range colder for every 75–100hp you increase. In identical spark plug types, the difference from one full heat range to the next is the ability to remove 70°C to 100°C from the combustion chamber." "for domestic manufacturers (Champion, Autolite, Splitfire), the higher the number, the hotter the plug. For Japanese manufacturers (NGK, Denso), the higher the number, the colder the plug." (Message edited by spyder12s on December 29, 2004) (Message edited by spyder12s on December 29, 2004)   Bigbuells Posted on Wednesday, December 29, 2004 - 08:21 pm:        no i just found this out...a 3/4 inch socket will NOT fit in the rear .I'm going to order the 2316's   Bigbuells Posted on Wednesday, December 29, 2004 - 08:36 pm:        or 18mm I didnt have one though

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