freddie900
Expert Class
zx 14 2007
Posts: 152
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posted May 09, 2010 11:26 AM
what spark plugs besides oem CR9EIA-9
Is there anything better than factory plugs? I burn 87 octane gas in the tank. I'm doing my first plug change.
  
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masszx14
Pro
A mind beside itself!
Posts: 1806
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posted May 09, 2010 01:36 PM
NGK iridium spark plugs- CR9EIX
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universal@mind
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freddie900
Expert Class
zx 14 2007
Posts: 152
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posted May 09, 2010 02:11 PM
What are the benefit with the plugs?
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RACNRAY
Expert Class
FAST OLD GUY
Posts: 178
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posted May 09, 2010 04:15 PM
The CR9EIA-9 and the CR9EIX plugs are slightly different, and except for some skoots the CR9EIA-9 is the better plug. The difference between the plugs is the CR9EIA-9 is a projected tip plug which puts the electrode gap deeper into the center of the combustion chamber, which from my experience promotes better combustion.
In my experience the only alternative to the CR9EIA-9 that rivals it's peformance, or has shown to offer a slight performance improvement is the CR9EK-PA, which is a projected tip
dual ground electrode platinum plug. It is about $4 more per plug.
Stay with the CR9EIA-9 plug for it's benefits from it's projected tip design.
RACNRAY
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no chicken strips on this south florida boy's skoots!!
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osr
Expert Class
Posts: 459
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posted May 09, 2010 05:36 PM
c9e
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freddie900
Expert Class
zx 14 2007
Posts: 152
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posted May 10, 2010 12:37 PM
Anyone try spitfire plugs
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smokinZX14
Needs a life
Posts: 10197
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posted May 10, 2010 12:54 PM
quote:
Anyone try spitfire plugs
Years ago i tried them in my hemi car ...They didn't work for shit ..
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Smokin Performance Cycles..
Tampa Bay , FL .. Brocks Performance Dealer ..
Gen 2 ZX14R Best ET 8.43 , Best MPH 164.95
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zxbob
Pro
Posts: 1692
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posted May 10, 2010 04:05 PM
I ran the C9E in my 14 . . . . the stock plugs dont like race gas or boost.
Never had any ill side effects with my bike !
Bob
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Good parts aint cheap and cheap parts aint good !
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Compton
Zone Head
Posts: 969
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posted May 10, 2010 04:09 PM
CR9E here
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b.w.
zx14, little longer, little louder, little lower.
08 Busa, just a little longer and louder and lower than the 14
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freddie900
Expert Class
zx 14 2007
Posts: 152
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posted May 10, 2010 04:13 PM
quote:
quote:
Anyone try spitfire plugs
Years ago i tried them in my hemi car ...They didn't work for shit ..
lee what plugs do recommond for 87 octane
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SLVR_BLT
Zone Head
Chicken Strips!
Posts: 589
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posted May 10, 2010 04:30 PM
CR9E for boosted or NOS guys, and Stock CR9EIA-9 Laser Iridium for stock bikes or bikes with mild mods.
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2006 Kawasaki ZX14, Muzzy Full Titanium Exhaust w/ Carbon Can, PCIII, BMC Street Filter
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masszx14
Pro
A mind beside itself!
Posts: 1806
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posted May 10, 2010 06:23 PM
Some guys swear by the ngk iridiums and some say don't bother.
On my track gsxr swapping to iridiums resulted in crisper throttle response,
but maybe the oems were gone at 3K mostly track miles.
Either way- I put mine in and liked the result.
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universal@mind
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epd345
Pro
Posts: 1494
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posted July 26, 2011 11:40 AM
I just picked up four CR9EIX, thats what the guy at the parts store cross referenced for me for irridium plugs. These are correct right?
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2012 ZX14, Ceramic Coated Brock's CT Meg, PCV, throttlemeister
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dubious
Needs a life
Needs more time to ride!
Posts: 8442
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posted July 27, 2011 06:03 AM
I noticed mine ran much cleaner, better throttle reeponse after replacing them at approx 8,000 km.
They were dirty looking, I guess with a fat 12.9:1 map they carbon up faster than the epa map.
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natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
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kaw now
Expert Class
Posts: 446
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posted July 27, 2011 07:00 AM
I just put a new set of the stock CR9EIA-9s in the old ones with about 22K on them just looked a bit normal deposits on them. Ride on the street only with a full system. For long plug life reliability they seem like a good bet too me. I'm not going to second guess factory setup on this one. The bike seems to run a little crisper now.
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